ONOS-6084 Statistics were absent for the flows posted when device master was null. The issue is fixed with this code change

Change-Id: I15be1c65955e9ede797fa3438f70426db0c078a6
diff --git a/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java b/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java
index bd96bdf..08f3373 100644
--- a/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java
+++ b/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java
@@ -360,7 +360,7 @@
                            f3, FlowEntryState.PENDING_ADD)));
 
         validateEvents(RULE_ADD_REQUESTED, RULE_ADD_REQUESTED, RULE_ADD_REQUESTED,
-                       RULE_ADDED, RULE_ADDED);
+                       RULE_ADDED, RULE_ADDED, RULE_ADD_REQUESTED);
     }
 
     @Test