Fix Maven configuration mappings in Ivy.

It turns out there was a very subtle, and evil, issue sitting the Ivy/maven configuration, and it
related to dependency mapping.    A mapping of `foo->bar(*)` means that the local configuration
`foo` depends on the remote configuration `bar`, if it exists, or *ALL CONFIGURATIONS* if `bar`
does not exist.   Since the default Ivy configuration mapping was using the random `master`
configuration, which AFAICT is NEVER specified, just an assumed default, this would cause leaks
between maven + ivy projects.

i.e. if  a maven POM depends on a module denoted by an ivy.xml file, then you'd wind up accidentally
bleeding ALL the ivy module's configurations into the maven module's configurations.

This fix works around the issue, by assuming that if there is no `master` configuration, than the
maven default of `compile` is intended.   As sbt forces generated `ivy.xml` files to abide by
maven conventions, this works in all of our test cases.   The only scenario where it wouldn't work
is those who have custom ivy.xml files *and* have pom.xml files which rely on those custom ivy.xml files,
a very unlikely situation where the workaround is:  "define a master configuration".

Includes a test demonstrating the issue.

ivy/src/main/scala/org/apache/ivy/plugins/parser/m2/EvilHackery.scala

@@ -0,0 +1,93 @@
+package org.apache.ivy.plugins.parser.m2
+
+import org.apache.ivy.core.module.descriptor.DefaultDependencyDescriptor;
+
+/**
+ * Helper evil hackery method to ensure Maven configurations + Ivy i
+ */
+object EvilHackery {
+
+  val REPLACEMENT_MAVEN_MAPPINGS = {
+    // Here we copy paste from Ivy
+    val REPLACEMENT_MAPPINGS = new java.util.HashMap[String, PomModuleDescriptorBuilder.ConfMapper]
+
+    REPLACEMENT_MAPPINGS.put("compile", new PomModuleDescriptorBuilder.ConfMapper {
+      def addMappingConfs(dd: DefaultDependencyDescriptor, isOptional: Boolean) {
+        if (isOptional) {
+          dd.addDependencyConfiguration("optional", "compile(*)")
+          // NOTE - This is the problematic piece we're dropping.  EVIL!!!!
+          dd.addDependencyConfiguration("optional", "master(compile)")
+        } else {
+          dd.addDependencyConfiguration("compile", "compile(*)")
+          // NOTE - This is the problematic piece we're dropping, as `master` is not special cased.
+          dd.addDependencyConfiguration("compile", "master(compile)")
+          dd.addDependencyConfiguration("runtime", "runtime(*)")
+        }
+      }
+    })
+
+    REPLACEMENT_MAPPINGS.put("provided", new PomModuleDescriptorBuilder.ConfMapper {
+      def addMappingConfs(dd: DefaultDependencyDescriptor, isOptional: Boolean) {
+        if (isOptional) {
+          dd.addDependencyConfiguration("optional", "compile(*)")
+          dd.addDependencyConfiguration("optional", "provided(*)")
+          dd.addDependencyConfiguration("optional", "runtime(*)")
+          // Remove evil hackery
+          dd.addDependencyConfiguration("optional", "master(compile)")
+        } else {
+          dd.addDependencyConfiguration("provided", "compile(*)")
+          dd.addDependencyConfiguration("provided", "provided(*)")
+          dd.addDependencyConfiguration("provided", "runtime(*)")
+          // Remove evil hackery
+          dd.addDependencyConfiguration("provided", "master(compile)")
+        }
+      }
+    })
+
+    REPLACEMENT_MAPPINGS.put("runtime", new PomModuleDescriptorBuilder.ConfMapper {
+      def addMappingConfs(dd: DefaultDependencyDescriptor, isOptional: Boolean) {
+        if (isOptional) {
+          dd.addDependencyConfiguration("optional", "compile(*)")
+          dd.addDependencyConfiguration("optional", "provided(*)")
+          // Remove evil hackery
+          dd.addDependencyConfiguration("optional", "master(compile)")
+        } else {
+          dd.addDependencyConfiguration("runtime", "compile(*)")
+          dd.addDependencyConfiguration("runtime", "runtime(*)")
+          // Remove evil hackery
+          dd.addDependencyConfiguration("runtime", "master(compile)")
+        }
+      }
+    })
+
+    REPLACEMENT_MAPPINGS.put("test", new PomModuleDescriptorBuilder.ConfMapper {
+      def addMappingConfs(dd: DefaultDependencyDescriptor, isOptional: Boolean) {
+        dd.addDependencyConfiguration("test", "runtime(*)")
+        // Remove evil hackery
+        dd.addDependencyConfiguration("test", "master(compile)")
+      }
+    })
+
+    REPLACEMENT_MAPPINGS.put("system", new PomModuleDescriptorBuilder.ConfMapper {
+      def addMappingConfs(dd: DefaultDependencyDescriptor, isOptional: Boolean) {
+        // Hacked
+        dd.addDependencyConfiguration("system", "master(compile)")
+      }
+    })
+
+    REPLACEMENT_MAPPINGS
+  }
+
+  def init(): Unit = {
+    // SUPER EVIL INITIALIZATION
+    try {
+      val map = PomModuleDescriptorBuilder.MAVEN2_CONF_MAPPING.asInstanceOf[java.util.Map[String, PomModuleDescriptorBuilder.ConfMapper]]
+      map.clear()
+      map.putAll(REPLACEMENT_MAVEN_MAPPINGS)
+    } catch {
+      case e: Exception =>
+        // TODO - Log that Ivy may not be configured correctly and you could have maven/ivy issues.
+        throw new RuntimeException("FAILURE to install Ivy maven hooks.  Your ivy-maven interaction may suffer resolution errors", e)
+    }
+  }
+}

ivy/src/main/scala/sbt/CustomPomParser.scala

@@ -4,7 +4,7 @@ import org.apache.ivy.core.module.id.ModuleRevisionId
 import org.apache.ivy.core.module.descriptor.{ DefaultArtifact, DefaultExtendsDescriptor, DefaultModuleDescriptor, ModuleDescriptor }
 import org.apache.ivy.core.module.descriptor.{ DefaultDependencyDescriptor, DependencyDescriptor }
 import org.apache.ivy.plugins.parser.{ ModuleDescriptorParser, ModuleDescriptorParserRegistry, ParserSettings }
-import org.apache.ivy.plugins.parser.m2.{ PomModuleDescriptorBuilder, PomModuleDescriptorParser }
+import org.apache.ivy.plugins.parser.m2.{ EvilHackery, PomModuleDescriptorBuilder, PomModuleDescriptorParser }
 import org.apache.ivy.plugins.repository.Resource
 import org.apache.ivy.plugins.namespace.NamespaceTransformer
 import org.apache.ivy.util.extendable.ExtendableItem
@@ -27,6 +27,10 @@ final class CustomPomParser(delegate: ModuleDescriptorParser, transform: (Module
   override def getMetadataArtifact(mrid: ModuleRevisionId, res: Resource) = delegate.getMetadataArtifact(mrid, res)
 }
 object CustomPomParser {
+
+  // Evil hackery to override the default maven pom mappings.
+  EvilHackery.init()
+
   /** The key prefix that indicates that this is used only to store extra information and is not intended for dependency resolution.*/
   val InfoKeyPrefix = "info."
   val ApiURLKey = "info.apiURL"