Changes to make Devstack work with Neutron L3 plugin patch.

Implements bp/quantum-l3-plugin-support

Change-Id: I0c56661685fb641efe34fee1390d7d4f37f84494
VMware: remove invalid configuration variable

The configuration variable vmware_cluster_name is not used by the cinder plugin.

Change-Id: I8c0ed58d1dcd66b6f8ea3325007bf5135216933c
Merge "Changes to make Devstack work with Neutron L3 plugin patch."
Merge "VMware: remove invalid configuration variable"
Merge branch 'master' of github.com:openstack-dev/devstack