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/keywords/InClassBeforeFun.kt

@@ -0,0 +1,36 @@
+public class Test {
+
+    <caret>
+
+    fun test() {
+
+    }
+}
+
+
+// EXIST:  abstract
+// EXIST:  annotation
+// EXIST:  class
+// EXIST:  enum
+// EXIST:  final
+// EXIST:  fun
+// EXIST:  in
+/*why?*/
+// EXIST:  inner
+// EXIST:  internal
+// EXIST:  object
+// EXIST:  open
+// EXIST:  out
+/*why?*/
+// EXIST:  override
+// EXIST:  private
+// EXIST:  protected
+// EXIST:  public
+// EXIST:  trait
+// EXIST:  val
+// EXIST:  var
+// EXIST:  vararg
+// EXIST:  constructor
+// EXIST:  init
+/*why?*/
+// NUMBER: 23