Drop query parameter 'id' from identity mapping

Keystone API does not respect any query parameters such as 'id'
when listing mappings [1],[2].

[1] 0155ae8741/keystone/api/os_federation.py (L267)
[2] https://docs.openstack.org/api-ref/identity/v3-ext/index.html?expanded=list-mappings-detail#list-mappings

Change-Id: Ie1d0bc69da65861215b13fcb5499d7f982a25282

openstack/identity/v3/mapping.py

@@ -27,9 +27,7 @@ class Mapping(resource.Resource):
     create_method = 'PUT'
     commit_method = 'PATCH'
 
-    _query_mapping = resource.QueryParameters(
-        'id',
-    )
+    _query_mapping = resource.QueryParameters()
 
     # Properties
     #: The rules of this mapping. *Type: list*

openstack/tests/unit/identity/v3/test_mapping.py

@@ -38,7 +38,6 @@ class TestMapping(base.TestCase):
 
         self.assertDictEqual(
             {
-                'id': 'id',
                 'limit': 'limit',
                 'marker': 'marker',
             },