Fix endpoint examples in api-ref

Endpoints have no name property[1] so specifying one in an update
request is incorrect, nor should we expect one in response to a create.

[1] http://git.openstack.org/cgit/openstack/keystone/tree/keystone/catalog/schema.py?h=12.0.0#n90

Change-Id: I94ae15ef77872523920ed0b43fe5e09755766fb5

api-ref/source/v3/samples/admin/endpoint-create-response.json

@@ -9,7 +9,6 @@
         "enabled": true,
         "interface": "public",
         "service_id": "9242e05f0c23467bbd1cf1f7a6e5e596",
-        "id": "e9b475a8742d4ff1a81b353c5a37e138",
-        "name": "ec2-2"
+        "id": "e9b475a8742d4ff1a81b353c5a37e138"
     }
 }

api-ref/source/v3/samples/admin/endpoint-update-request.json

@@ -1,7 +1,6 @@
 {
     "endpoint": {
         "interface": "public",
-        "name": "Name",
         "region_id": "north",
         "url": "http://example.com/identity/v3/endpoints/828384",
         "service_id": "345678"