Moved current incremental compiler test data into subdirectory.

Tweaked test generator to avoid creating test methods for parent directory of tests.

jps-plugin/testData/incremental/pureKotlin/classObjectConstantChanged/build.log

@@ -0,0 +1,13 @@
+Cleaning output files:
+out/production/module/test/Klass$object.class
+out/production/module/test/Klass.class
+End of files
+Compiling files:
+src/const.kt
+End of files
+Cleaning output files:
+out/production/module/test/Usage.class
+End of files
+Compiling files:
+src/usage.kt
+End of files