Replace the OVN Metadata agent with the OVN agent

The OVN Metadata agent is replaced in any CI job with the OVN
agent. This is an incremental step on the deprecation of the
OVN Metadata agent.

Related-Bug: #2112313
Signed-off-by: Rodolfo Alonso Hernandez <ralonsoh@redhat.com>
Change-Id: I4e8d12762099c91d773c4f5e5699bc9fed43a9c9

.zuul.yaml

@@ -620,7 +620,7 @@
         ovsdb-server: true
         # Neutron services
         q-svc: true
-        q-ovn-metadata-agent: true
+        q-ovn-agent: true
         # Swift services
         s-account: true
         s-container: true
@@ -657,7 +657,7 @@
           ovs-vswitchd: true
           ovsdb-server: true
           # Neutron services
-          q-ovn-metadata-agent: true
+          q-ovn-agent: true
           # Cinder services
           c-bak: true
           c-vol: true

lib/neutron_plugins/ovn_agent

@@ -96,8 +96,9 @@ OVN_META_CONF=$NEUTRON_CONF_DIR/neutron_ovn_metadata_agent.ini
 OVN_META_DATA_HOST=${OVN_META_DATA_HOST:-$(ipv6_unquote $SERVICE_HOST)}
 
 # OVN agent configuration
+# The OVN agent is configured, by default, with the "metadata" extension.
 OVN_AGENT_CONF=$NEUTRON_CONF_DIR/plugins/ml2/ovn_agent.ini
-OVN_AGENT_EXTENSIONS=${OVN_AGENT_EXTENSIONS:-}
+OVN_AGENT_EXTENSIONS=${OVN_AGENT_EXTENSIONS:-metadata}
 
 # If True (default) the node will be considered a gateway node.
 ENABLE_CHASSIS_AS_GW=$(trueorfalse True ENABLE_CHASSIS_AS_GW)

stackrc

@@ -75,7 +75,7 @@ if ! isset ENABLED_SERVICES ; then
     # OVN
     ENABLED_SERVICES+=,ovn-controller,ovn-northd,ovs-vswitchd,ovsdb-server
     # Neutron
-    ENABLED_SERVICES+=,q-svc,q-ovn-metadata-agent
+    ENABLED_SERVICES+=,q-svc,q-ovn-agent
     # Dashboard
     ENABLED_SERVICES+=,horizon
     # Additional services