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/common/ImmediateMembers5.kt

@@ -0,0 +1,27 @@
+fun globalFun(){}
+
+trait T {
+    fun fromTrait(){}
+}
+
+abstract class Base : T {
+    fun fromBase(){}
+}
+
+class Derived : Base() {
+    override fun fromTrait() { }
+
+    fun fromDerived(){}
+
+    fun foo(d: Derived) {
+        <caret>
+    }
+}
+
+// EXIST: { itemText: "foo", attributes: "bold" }
+// EXIST: { itemText: "fromTrait", attributes: "bold" }
+// EXIST: { itemText: "fromDerived", attributes: "bold" }
+// EXIST: { itemText: "fromBase", attributes: "" }
+// EXIST: { itemText: "hashCode", attributes: "" }
+// EXIST: { itemText: "equals", attributes: "" }
+// EXIST: { itemText: "globalFun", attributes: "" }