Bug 2435 - Controller/MD-SAL throwing ModifiedNodeDoesNotExistException exception when statistics manager
augment queue statistics to the node connector. Exception was thrown because parent (queue) container was
not present when statistics manager tried to augment statistics. Fixed the issue by creating empty queue
container and 'merge'ing it to the node connector before augmenting the statistics.
Signed-off-by: Anil Vishnoi <vishnoianil@gmail.com>
Change-Id: I7d68f3e177ccf62c7adf154e655226450a74296c