Fixing issue on group permission validating

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/authorization/DeviceAccessAuthorizationServiceImpl.java

@@ -38,6 +38,7 @@ import org.wso2.carbon.user.api.UserRealm;
 import org.wso2.carbon.user.api.UserStoreException;
 
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
@@ -186,10 +187,14 @@ public class DeviceAccessAuthorizationServiceImpl implements DeviceAccessAuthori
                 DeviceManagementDataHolder.getInstance().getGroupManagementProviderService()
                         .getGroups(deviceIdentifier);
         for (DeviceGroup group : authorizedGroups) {
-            if (groupsWithDevice.contains(group)) {
+            Iterator<DeviceGroup> groupsWithDeviceIterator = groupsWithDevice.iterator();
+            while (groupsWithDeviceIterator.hasNext()) {
+                DeviceGroup deviceGroup = groupsWithDeviceIterator.next();
+                if (deviceGroup.getId() == group.getId()) {
                     return true;
                 }
             }
+        }
         return false;
     }