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/smartMultiFile/GenericInheritors4/GenericInheritors4.kt

@@ -0,0 +1,8 @@
+import p.*
+
+fun foo(): KotlinTrait<I1<I2>> {
+    return <caret>
+}
+
+// EXIST: { lookupString: "object", itemText: "object: KotlinTrait<I1<I2>>{...}" }
+// EXIST: { lookupString: "KotlinInheritor", itemText: "KotlinInheritor<I2>", tailText: "() (p)" }

idea/idea-completion/testData/smartMultiFile/GenericInheritors4/KotlinInheritors.kt

@@ -0,0 +1,10 @@
+package p
+
+trait I1<T>
+trait I2
+
+trait KotlinTrait<T>
+
+class KotlinInheritor<T> : KotlinTrait<I1<T>>
+
+// ALLOW_AST_ACCESS