Created module idea-test-framework and moved classes needed for idea tests there

Moved tests for completion and their test data into module idea-completion

idea/idea-completion/testData/basic/java/PropertyMetadata.kt

@@ -0,0 +1,10 @@
+/* Number of result in completion should be fixed after removing duplicates */
+package first
+
+fun firstFun() {
+  val a = PropertyM<caret>
+}
+
+// INVOCATION_COUNT: 1
+// EXIST: { lookupString:"PropertyMetadata", itemText:"PropertyMetadata", tailText:" (kotlin)" }
+// EXIST: { lookupString:"PropertyMetadataImpl", itemText:"PropertyMetadataImpl", tailText:" (kotlin)" }