[OVN] Remove the datapath UUID from the metadata namespaces

Since [1], the OVN Metadata agent uses the Neutron network UUID
to create the namespace name, instead of using the datapath ID.
The code supporting both names should have been removed in Yoga
release.

[1]https://review.opendev.org/c/openstack/neutron/+/768462

Signed-off-by: Rodolfo Alonso Hernandez <ralonsoh@redhat.com>
Change-Id: I742901641e912d2a5df5337fdb332e44252d62ee

neutron/agent/ovn/metadata/agent.py

@@ -552,7 +552,7 @@ class MetadataAgent:
                              ns not in metadata_namespaces]
         for ns in unused_namespaces:
             try:
-                self.teardown_datapath(self._get_datapath_name(ns))
+                self.teardown_datapath(self._get_network_name(ns))
             except Exception:
                 LOG.exception('Error unable to destroy namespace: %s', ns)
 
@@ -569,7 +569,7 @@ class MetadataAgent:
                                 datapath[:10], i) for i in [0, 1]]
 
     @staticmethod
-    def _get_datapath_name(namespace):
+    def _get_network_name(namespace):
         return namespace[len(NS_PREFIX):]
 
     @staticmethod