Tests for fixed issues

#KT-1736 fixed
 #KT-1244 fixed
 #KT-1738 fixed

compiler/testData/diagnostics/tests/scopes/kt1244.jet

@@ -0,0 +1,13 @@
+//KT-1244 Frontend allows access to private members of other classes
+
+package kt1244
+
+class A {
+    private var a = ""
+}
+
+class B() {
+    {
+        A().<!INVISIBLE_MEMBER!>a<!> = "Hello"
+    }
+}

compiler/testData/diagnostics/tests/scopes/kt1738.jet

@@ -0,0 +1,11 @@
+//KT-1738 Make it possible to define visibility for constructor parameters which become properties
+
+package kt1738
+
+class A(private var i: Int, var j: Int) {
+}
+
+fun test(a: A) {
+    a.<!INVISIBLE_MEMBER!>i<!>++
+    a.j++
+}