Various small fixes

Change-Id: I83802169d0d968f7b88d4be2cedba74b15fdd7da
diff --git a/core/api/src/test/java/org/onosproject/store/service/WallClockTimestampTest.java b/core/api/src/test/java/org/onosproject/store/service/WallClockTimestampTest.java
index 3f02fef..8ea04fd 100644
--- a/core/api/src/test/java/org/onosproject/store/service/WallClockTimestampTest.java
+++ b/core/api/src/test/java/org/onosproject/store/service/WallClockTimestampTest.java
@@ -30,6 +30,7 @@
  */
 public class WallClockTimestampTest {
 
+    @SuppressWarnings("SelfComparison")
     @Test
     public final void testBasic() throws InterruptedException {
         WallClockTimestamp ts1 = new WallClockTimestamp();