Fixed findAllRefs/getOccs bug where private properties declared in the constructor were only local to the constructor.

Fixes #975.

tests/cases/fourslash/findAllRefsOnPrivateParameterProperty1.ts

@@ -0,0 +1,18 @@
+/// <reference path="fourslash.ts" />
+
+////class ABCD {
+////    constructor(private x: number, public y: number, private [|z|]: number) {
+////    }
+////
+////    func() {
+////        return this.[|z|];
+////    }
+////}
+
+test.ranges().forEach(r => {
+    goTo.position(r.start);
+
+    test.ranges().forEach(range => {
+        verify.referencesAtPositionContains(range);
+    });
+});