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/constantsUnchanged/build.log

@@ -0,0 +1,9 @@
+Cleaning output files:
+out/production/module/test/Klass$object.class
+out/production/module/test/Klass.class
+out/production/module/test/TestPackage-const-*.class
+out/production/module/test/TestPackage.class
+End of files
+Compiling files:
+src/const.kt
+End of files

jps-plugin/testData/incremental/pureKotlin/constantsUnchanged/const.kt

@@ -0,0 +1,9 @@
+package test
+
+val CONST = "foo"
+
+class Klass {
+    class object {
+        val CONST = "bar"
+    }
+}

jps-plugin/testData/incremental/pureKotlin/constantsUnchanged/const.kt.new

@@ -0,0 +1,9 @@
+package test
+
+val CONST = "foo"
+
+class Klass {
+    class object {
+        val CONST = "bar"
+    }
+}

jps-plugin/testData/incremental/pureKotlin/constantsUnchanged/usage.kt

@@ -0,0 +1,4 @@
+package test
+
+deprecated(CONST + Klass.CONST)
+class Usage