Address unit test issue

This is an amendment to gerrit 20469.
Unit test fails if test cases are executed in parallel.
The same issue has been addressed in branch 1.12 to 1.15 (gerrit 20700-20703)

Change-Id: I43f7bd2f2c0836cf478af3ed9f9c0e931e02d4c8
diff --git a/core/net/src/main/java/org/onosproject/net/flowobjective/impl/InOrderFlowObjectiveManager.java b/core/net/src/main/java/org/onosproject/net/flowobjective/impl/InOrderFlowObjectiveManager.java
index 3f4de99..457c6e6 100644
--- a/core/net/src/main/java/org/onosproject/net/flowobjective/impl/InOrderFlowObjectiveManager.java
+++ b/core/net/src/main/java/org/onosproject/net/flowobjective/impl/InOrderFlowObjectiveManager.java
@@ -63,7 +63,7 @@
     private final Logger log = LoggerFactory.getLogger(getClass());
 
     // TODO Make queue timeout configurable
-    static final int OBJ_TIMEOUT_MS = 15000;
+    static int objTimeoutMs = 15000;
 
     private Cache<FilteringObjQueueKey, Objective> filtObjQueueHead;
     private Cache<ForwardingObjQueueKey, Objective> fwdObjQueueHead;
@@ -105,15 +105,15 @@
             }
         };
         filtObjQueueHead = CacheBuilder.newBuilder()
-                .expireAfterWrite(OBJ_TIMEOUT_MS, TimeUnit.MILLISECONDS)
+                .expireAfterWrite(objTimeoutMs, TimeUnit.MILLISECONDS)
                 .removalListener(RemovalListeners.asynchronous(removalListener, filtCacheEventExecutor))
                 .build();
         fwdObjQueueHead = CacheBuilder.newBuilder()
-                .expireAfterWrite(OBJ_TIMEOUT_MS, TimeUnit.MILLISECONDS)
+                .expireAfterWrite(objTimeoutMs, TimeUnit.MILLISECONDS)
                 .removalListener(RemovalListeners.asynchronous(removalListener, fwdCacheEventExecutor))
                 .build();
         nextObjQueueHead = CacheBuilder.newBuilder()
-                .expireAfterWrite(OBJ_TIMEOUT_MS, TimeUnit.MILLISECONDS)
+                .expireAfterWrite(objTimeoutMs, TimeUnit.MILLISECONDS)
                 .removalListener(RemovalListeners.asynchronous(removalListener, nextCacheEventExecutor))
                 .build();
 
@@ -122,7 +122,7 @@
             filtObjQueueHead.cleanUp();
             fwdObjQueueHead.cleanUp();
             nextObjQueueHead.cleanUp();
-        }, 0, OBJ_TIMEOUT_MS, TimeUnit.MILLISECONDS);
+        }, 0, objTimeoutMs, TimeUnit.MILLISECONDS);
 
         // Replace store delegate to make sure pendingForward and pendingNext are resubmitted to
         // execute()