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/inlineFunctionsCircularDependency/b.kt

@@ -0,0 +1,7 @@
+package test
+
+inline fun b(body: () -> Unit) {
+    println("I'm inline function b")
+    body()
+    a { println("To be inlined from b") }
+}