no duplicates in java var name suggestions

java/java-tests/testData/codeInsight/completion/variables/DuplicateSuggestionsFromUsage.java

@@ -0,0 +1,11 @@
+public class Foo {
+
+  void bar() {
+    APreferencePolicy p<caret> = 2;
+    System.out.println(policy);
+  }
+}
+
+class APreferencePolicy {
+
+}