Removes the NeutronScale resource from controller pcmk manifest

Removes the NeutronScale resource from controller pcmk manifest

As reported in https://bugzilla.redhat.com/show_bug.cgi?id=1238117
and https://bugzilla.redhat.com/show_bug.cgi?id=1236578 the
NeutronScale resource is causing problems during post deploy
configuration of the overcloud (momentary inconsistency in the
host name for the neutron agents, given what NeutronScale does,
discussion in BZ 1238117).

As discussed in the bugs, we may not need NeutronScale, since our
host names should be safe enough for scaling. This change removes
neutron scale completely and links startup of neutron-server
directly to neutron-ovs-cleanup. If we can safely remove
the NeutronScale resource then this change does that.

Change-Id: Ib43a2d60b85fd9bb48eff5919602bb74dc463905