Don't special case Grenade + systemd
Don't special case Grenade + systemd

Now that the pike branch exists we don't want to special case grenade +
system on the target side. We should use systemd for both sides of the
pike -> master upgrade. Note this change should not be backported so
that we do not attempt to use systemd on the ocata -> pike upgrade path.

Depends-On: Iedf824a1772115e0dff287a898636f8e58471269
Change-Id: I6198bf1842a44773fce80672c81eee3afc3c6f38

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