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/weighers/smart/SmartPriority.kt

@@ -0,0 +1,22 @@
+var nonNullable: C = C()
+
+class C {
+    var nullableX: C? = null
+    var nullableFoo: C? = null
+
+    fun foo(pFoo: C, s: String) {
+        val local = C()
+        foo(<caret>)
+    }
+}
+
+// ORDER: "pFoo, s"
+// ORDER: pFoo
+// ORDER: nullableFoo
+// ORDER: nullableFoo
+// ORDER: this
+// ORDER: local
+// ORDER: nonNullable
+// ORDER: nullableX
+// ORDER: nullableX
+// ORDER: C