RBA Unit test enhancements

- Include a copy of the unit test framework so we're no longer
  depending on incompatible versions for Ruby 1 and 2.
- Avoid duplication of path entries in unit tests

testdata/python/dbLayoutTest.py

@@ -1,3 +1,20 @@
+# KLayout Layout Viewer
+# Copyright (C) 2006-2017 Matthias Koefferlein
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
 
 import pya
 import unittest