QoS and Queues not removed from operational after delete when using OVS 2.5 docker image

Bug was observed in southbound-it. Specifically in SouthboundIT.testAddDeleteQueue and SouthboundIT.testAddDeleteQoS but also in other tests.

Root cause is code in the execute method of OvsdbQoSRemovedCommand and OvsdbQueueRemovedCommand. The deleteQoS/Queue methods are only called if the update notification contains modifications to the OpenVSwitch table. My guess is that in 2.5 OVS optimizes the notification out for the OpenVSwitch table because although an update was sent to OVS, data was not changed.