[stable-2.8] Don't detect update if vrf not set. (#56235) (#56421)

* [stable-2.8] Don't detect update if vrf not set. (#56235)
(cherry picked from commit ea41bbc)

changelogs/fragments/56235-eapi-vrf.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- "eos_eapi: fix idempotency issues when vrf was unspecified."

lib/ansible/modules/network/eos/eos_eapi.py

@@ -299,7 +299,7 @@ def map_config_to_obj(module):
         'local_http': out[0]['localHttpServer']['configured'],
         'local_http_port': out[0]['localHttpServer']['port'],
         'socket': out[0]['unixSocketServer']['configured'],
-        'vrf': out[0]['vrf'],
+        'vrf': out[0]['vrf'] or "default",
         'state': parse_state(out)
     }