output_graph method fix. when using json_graph.node_link_data, it puts in default 'id' in the each vertex properties with the value of the vitrage_id implements: blueprint static-synchronizer
output_graph method fix.
when using json_graph.node_link_data, it puts in default
'id' in the each vertex properties with the value of the vitrage_id
implements: blueprint static-synchronizer

Change-Id: Id7b518b934f9063efbaaf4ef2395077753556f40

openstack/vitrage,openstack/vitrage,openstack/vitrage