Implements framework for ironic_neutron_agent and Neutron 'baremetal' plugin

This patch implements the framework for the ironic_neutron_agent group
to be used with the 'baremetal' plugin for Neutron.

Change-Id: If89e56dc72f017bc57be8cede73d12bf8df572dd

inventory/env.d/neutron.yml

@@ -14,6 +14,9 @@
 # limitations under the License.
 
 component_skel:
+  ironic_neutron_agent:
+    belongs_to:
+      - neutron_all
   neutron_agent:
     belongs_to:
       - neutron_all
@@ -54,6 +57,7 @@ container_skel:
       - network_containers
       - network-agent_containers
     contains:
+      - ironic_neutron_agent
       - neutron_agent
       - neutron_bgp_dragent
       - neutron_dhcp_agent

inventory/inventory.ini

@@ -179,6 +179,7 @@ murano_engine
 [murano_engine]
 
 [neutron_all:children]
+ironic_neutron_agent
 neutron_agent
 neutron_bgp_dragent
 neutron_dhcp_agent
@@ -191,6 +192,7 @@ neutron_ovn_controller
 neutron_ovn_northd
 neutron_server
 neutron_sriov_nic_agent
+[ironic_neutron_agent]
 [neutron_agent]
 [neutron_bgp_dragent]
 [neutron_dhcp_agent]

tests/test_inventory.py

@@ -275,6 +275,7 @@ class TestAnsibleInventoryFormatConstraints(unittest.TestCase):
         'ironic-inspector_containers',
         'ironic-inspector_hosts',
         'ironic_inspector_container',
+        'ironic_neutron_agent',
         'key-manager_containers',
         'key-manager_hosts',
         'key-manager_all',