Provides group_names for use with provider_network plugin

This patch will provide group_names to the provider network object,
which will then be used to compare group_binds for selective
provider network placement across nodes.

Change-Id: I2964366ecc9052582d6eb39d1caf81027fa58271
Partial-Bug: #1787462
Depends-On: https://review.openstack.org/#/c/616377
(cherry picked from commit af0f439ec9)

ansible-role-requirements.yml

@@ -141,7 +141,7 @@
 - name: plugins
   scm: git
   src: https://git.openstack.org/openstack/openstack-ansible-plugins
-  version: 0e5b2c507a2933fbc3b84f9882d8b1596ed2f0da
+  version: 55803640ceb98305e9d90a795f86bf3858576852
 - name: rabbitmq_server
   scm: git
   src: https://git.openstack.org/openstack/openstack-ansible-rabbitmq_server

playbooks/common-playbooks/neutron.yml

@@ -77,6 +77,7 @@
         provider_networks: "{{ provider_networks }}"
         bind_prefix: "{{ provider_network_bind_prefix | default('') }}"
         is_metal: "{{ is_metal }}"
+        group_names: "{{ group_names }}"
       register: pndata
       when: neutron_provider_networks is not defined
       tags: