new_external_port and DB table adds

	- new_external_port() add to ovim, create a new external port and ensure the mapping correspondencer btw multimple sdn controllers
	- Add ofc_id, switch_mac columns to table "ports" & "resources_port"
	- Add foreign FK_port_ofc_id key btw "ports" and "ofcs"
	- Add foreign FK_resource_ofc_id key btw "resources_port" and "ofcs"

Change-Id: I3a3603a17f415954fad7520573e4d6d434791f96
Signed-off-by: mirabal <leonardo.mirabal@altran.com>
4 files changed