when(ovsdbConnectionInstance.getInstanceIdentifier()).thenReturn(mock(InstanceIdentifier.class));
ovsdbConnManager.disconnected(externalClient);
Map<ConnectionInfo, OvsdbConnectionInstance> testClients = Whitebox.getInternalState(ovsdbConnManager,
when(ovsdbConnectionInstance.getInstanceIdentifier()).thenReturn(mock(InstanceIdentifier.class));
ovsdbConnManager.disconnected(externalClient);
Map<ConnectionInfo, OvsdbConnectionInstance> testClients = Whitebox.getInternalState(ovsdbConnManager,