Add optional dependency mysql -> neutron-server
Add optional dependency mysql -> neutron-server

In cases where neutron server is on the same node
as mysqld it is desirable to have the database
running before the service.

Change-Id: I0a6c3a1d6481b4250a0a948c3e5a14e5a0a5e7de

arnaudmorinol/puppet-neutron,fuel-infra/puppet-neutron,IPnett/puppet-neutron,redhat-cip/puppet-neutron,cloudbuy/puppet-neutron,CiscoSystems/puppet-neutron,rdo-puppet-modules/puppet-neutron,aldavud/puppet-neutron,openstack/puppet-neutron,plumgrid/puppet-neutron,CiscoSystems/puppet-neutron,larsks/puppet-neutron,trihoangvo/puppet-neutron,hkumarmk/puppet-neutron,cloudbuy/puppet-neutron,IPnett/puppet-neutron,rdo-puppet-modules/puppet-neutron,NeCTAR-RC/puppet-neutron,varunarya10/puppet-neutron,NeCTAR-RC/puppet-neutron,openstack/puppet-neutron,plumgrid/puppet-neutron,JioCloud/puppet-neutron,hkumarmk/puppet-neutron,redhat-cip/puppet-neutron,hkumarmk/puppet-neutron,JioCloud/puppet-neutron,aldavud/puppet-neutron,redhat-cip/puppet-neutron,varunarya10/puppet-neutron,CiscoSystems/puppet-neutron,fuel-infra/puppet-neutron,aldavud/puppet-neutron,IPnett/puppet-neutron,NeCTAR-RC/puppet-neutron,JioCloud/puppet-neutron,trihoangvo/puppet-neutron,larsks/puppet-neutron,fuel-infra/puppet-neutron,arnaudmorinol/puppet-neutron,cloudbuy/puppet-neutron