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/smart/NotEqOperator.kt

@@ -0,0 +1,14 @@
+enum class E {
+    A
+    B
+}
+
+fun f(e1: E, e2: E?, x: Any) {
+    if (e1 != <caret>
+}
+
+// EXIST: { lookupString:"A", itemText:"E.A" }
+// EXIST: { lookupString:"B", itemText:"E.B" }
+// EXIST: e2
+// ABSENT: e1
+// ABSENT: x