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 <[email protected]>
Change-Id: I3a0740df6c71a163b9a05d849cebbcc5fec081cb

Author: ralonsoh

zuul.d/base.yaml

@@ -75,6 +75,7 @@
     vars:
       devstack_localrc:
         Q_AGENT: ovn
+        OVN_AGENT_EXTENSIONS: 'metadata'
         # NOTE(ralonsoh): during the eventlet removal, the "logger" mech
         # driver has been removed from this list. Re-add it once the removal
         # is finished or the mech driver does not call monkey_patch().
@@ -128,7 +129,8 @@
         q-l3: false
         ovn-northd: true
         ovn-controller: true
-        q-ovn-metadata-agent: true
+        q-ovn-metadata-agent: false
+        q-ovn-agent: true
         octavia: true
         o-api: true
         o-da: true