Added a production target to the makefile that only builds the containers that are required for a production deployment of voltha.
Added a production target to the makefile that only builds the
containers that are required for a production deployment of
voltha.

Change-Id: Ic0a72ca290f3804f731eb59f46a2fb61d9d99e5f

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