Fixing find bugs reported issues

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/EnrolmentInfo.java

@@ -118,4 +118,10 @@ public class EnrolmentInfo implements Serializable {
         }
         return false;
     }
+
+    @Override
+    public int hashCode() {
+        return owner.hashCode() ^ ownership.hashCode();
+    }
+
 }