Removing deprecated "re-publish release artifacts" behavior from tests.

In sbt 1.0 republishing released artifacts will be removed, causing these tests
to fail.  We migrate to SNAPSHOT version now, to prevent suprises.

sbt/src/sbt-test/dependency-management/cache-resolver/changes/def/Build.scala

@@ -5,7 +5,7 @@ object B extends Build {
 
 	override def settings = super.settings ++ Seq(
 		organization := "org.example",
-		version := "2.0"
+		version := "2.0-SNAPSHOT"
 	)
 
 	lazy val root = proj("root", ".") aggregate(a,b)

sbt/src/sbt-test/dependency-management/cache-resolver/changes/use/build.sbt

@@ -4,6 +4,6 @@ organization := "org.example"
 
 version := "1.0"
 
-libraryDependencies += "org.example" % "b" % "2.0"
+libraryDependencies += "org.example" % "b" % "2.0-SNAPSHOT"
 
 ivyPaths <<= ivyPaths in ThisBuild