Regard the release when the APIs became deprecated as Cardinal

Change-Id: I072fa33a2a70baa7466d7a0dc5067191476be0f3
diff --git a/core/api/src/main/java/org/onosproject/net/flow/FlowRuleStore.java b/core/api/src/main/java/org/onosproject/net/flow/FlowRuleStore.java
index 558221f..cece989 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/FlowRuleStore.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/FlowRuleStore.java
@@ -51,6 +51,7 @@
      * Stores a new flow rule without generating events.
      *
      * @param rule the flow rule to add
+     * @deprecated in Cardinal Release
      */
     @Deprecated
     void storeFlowRule(FlowRule rule);