VOL-501 Avoid assigning a None store_id when node does not have valid store_id yet
VOL-501 Avoid assigning a None store_id when node does not have valid store_id yet

Change-Id: I0ca7ca09293279567c34dfc5cb8275f51da2d690

opencord/voltha,opencord/voltha,opencord/voltha,opencord/voltha,opencord/voltha