Fix for flow equality bug which can cause:

 * multiple flows with the same match to be simultaneously present in the flow
   store, and
 * similar but different rule in switch and store, resulting in flows stuck in
   PENDING_ADD state.

Fixes ONOS-2426.

Ported from onos-1.2 branch.

Change-Id: I4b4e444c3a6dba7e4d3278e9469069e2dbdb9b67
diff --git a/web/api/src/test/java/org/onosproject/rest/FlowsResourceTest.java b/web/api/src/test/java/org/onosproject/rest/FlowsResourceTest.java
index 192c417..9cb63e7 100644
--- a/web/api/src/test/java/org/onosproject/rest/FlowsResourceTest.java
+++ b/web/api/src/test/java/org/onosproject/rest/FlowsResourceTest.java
@@ -15,14 +15,12 @@
  */
 package org.onosproject.rest;
 
-import java.io.InputStream;
-import java.net.HttpURLConnection;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Set;
-
-import javax.ws.rs.core.MediaType;
-
+import com.eclipsesource.json.JsonArray;
+import com.eclipsesource.json.JsonObject;
+import com.google.common.collect.ImmutableSet;
+import com.sun.jersey.api.client.ClientResponse;
+import com.sun.jersey.api.client.UniformInterfaceException;
+import com.sun.jersey.api.client.WebResource;
 import org.hamcrest.Description;
 import org.hamcrest.Matchers;
 import org.hamcrest.TypeSafeMatcher;
@@ -49,6 +47,7 @@
 import org.onosproject.net.flow.DefaultTrafficTreatment;
 import org.onosproject.net.flow.FlowEntry;
 import org.onosproject.net.flow.FlowId;
+import org.onosproject.net.flow.FlowRule;
 import org.onosproject.net.flow.FlowRuleExtPayLoad;
 import org.onosproject.net.flow.FlowRuleService;
 import org.onosproject.net.flow.TrafficSelector;
@@ -57,12 +56,12 @@
 import org.onosproject.net.flow.instructions.Instruction;
 import org.onosproject.net.flow.instructions.Instructions;
 
-import com.eclipsesource.json.JsonArray;
-import com.eclipsesource.json.JsonObject;
-import com.google.common.collect.ImmutableSet;
-import com.sun.jersey.api.client.ClientResponse;
-import com.sun.jersey.api.client.UniformInterfaceException;
-import com.sun.jersey.api.client.WebResource;
+import javax.ws.rs.core.MediaType;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
 
 import static org.easymock.EasyMock.anyObject;
 import static org.easymock.EasyMock.anyShort;
@@ -209,6 +208,11 @@
         }
 
         @Override
+        public boolean exactMatch(FlowRule rule) {
+            return false;
+        }
+
+        @Override
         public FlowRuleExtPayLoad payLoad() {
             return null;
         }