Add global_request_id to systemd logs
Add global_request_id to systemd logs

With cinder supporting this now, start logging global_request_id in
systemd logs. It will be None for all the services until the work
starts coming together, but it is safe to do.

Change-Id: Ic6ba1a42da88c03e43d89658b453f6a0b353e0db

nawawi/openstack,richliu/devstack,nawawi/openstack,dtroyer/devstack,group-policy/devstack,richliu/devstack,noironetworks/devstack,dtroyer/devstack,noironetworks/devstack,openstack-dev/devstack,openstack-dev/devstack,group-policy/devstack