Enable MAAS on AIOs
Enable MAAS on AIOs

Removed a line that explicitly disables MAAS deployment on AIOs
regardless of the value of DEPLOY_MAAS. This line wasn't necessary as
DEPLOY_MAAS defaults to no.

AIO + MAAS is useful for the RPC AIO gate check, otherwise it won't be
possible to test maas.

Related: #695

major/rpc-openstack,xeregin/rpc-openstack,rcbops/rpc-openstack,git-harry/rpc-openstack,galstrom21/rpc-openstack,sigmavirus24/rpc-openstack,byronmccollum/rpc-openstack,cloudnull/rpc-openstack,claco/rpc-openstack,BjoernT/rpc-openstack,darrenchan/rpc-openstack,hughsaunders/rpc-openstack,jacobwagner/rpc-openstack,git-harry/rpc-openstack,rcbops/rpc-openstack,major/rpc-openstack,shannonmitchell/rpc-openstack,prometheanfire/rpc-openstack,cfarquhar/rpc-openstack,darrenchan/rpc-openstack,hughsaunders/rpc-openstack,jacobwagner/rpc-openstack,byronmccollum/rpc-openstack,robb-romans/rpc-openstack,claco/rpc-openstack,BjoernT/rpc-openstack,robb-romans/rpc-openstack,sigmavirus24/rpc-openstack,mancdaz/rpc-openstack,mancdaz/rpc-openstack,xeregin/rpc-openstack,sigmavirus24/rpc-openstack,xeregin/rpc-openstack,cloudnull/rpc-openstack,byronmccollum/rpc-openstack,cfarquhar/rpc-openstack,sigmavirus24/rpc-openstack,prometheanfire/rpc-openstack,xeregin/rpc-openstack,shannonmitchell/rpc-openstack,darrenchan/rpc-openstack,claco/rpc-openstack,darrenchan/rpc-openstack,galstrom21/rpc-openstack