[ONOS-4992] Modify the return signature for FlowRuleService for consistent return object

Change-Id: I06154d79ea9d875c503369dcb77d5fffcfbd4467
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java b/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
index fa5c3c7..36b8d4c 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
@@ -206,12 +206,13 @@
     public Response getFlowByAppId(@PathParam("appId") String appId) {
         final ApplicationService appService = get(ApplicationService.class);
         final ApplicationId idInstant = nullIsNotFound(appService.getId(appId), APP_ID_NOT_FOUND);
-        final Iterable<FlowRule> flowRules = service.getFlowRulesById(idInstant);
+        final Iterable<FlowEntry> flowEntries = service.getFlowEntriesById(idInstant);
 
-        flowRules.forEach(flow -> flowsNode.add(codec(FlowRule.class).encode(flow, this)));
+        flowEntries.forEach(flow -> flowsNode.add(codec(FlowEntry.class).encode(flow, this)));
         return ok(root).build();
     }
 
+
     /**
      * Removes flow rules by application ID.
      * Removes a collection of flow rules generated by the given application.