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/InSecondaryConstructorFirstDefaultParameter.kt

@@ -0,0 +1,13 @@
+fun topLevel() = 1
+
+class A(val prop: Int, arg: Int) {
+    val another = 1
+    constructor(abc: Int, x: Int = <caret>): this(1, 1) {
+        val local = 1
+    }
+
+    fun foo() = 1
+}
+
+// EXIST: abc, topLevel, x, prop, another, foo
+// ABSENT: arg, local