Fix role_names call from V3 AccessInfo

This was probably initially written against an incorrect test token.

Change-Id: I3e1eb0cb207864dbadb01a477b180058902bb0cd
Closes-Bug: #1282410

keystoneclient/access.py

@@ -530,7 +530,7 @@ class AccessInfoV3(AccessInfo):
 
     @property
     def role_names(self):
-        return [r['name'] for r in self['user'].get('roles', [])]
+        return [r['name'] for r in self.get('roles', [])]
 
     @property
     def username(self):

keystoneclient/tests/v3/client_fixtures.py

@@ -126,6 +126,7 @@ DOMAIN_SCOPED_TOKEN = {
             },
             'id': 'c4da488862bd435c9e6c0275a0d0e49a',
             'name': 'exampleuser',
+        },
         'roles': [
             {
                 "id": "76e72a",
@@ -142,7 +143,6 @@ DOMAIN_SCOPED_TOKEN = {
                 "name": "member"
             }
         ],
-        },
         'domain': {
             'id': '8e9283b7ba0b1038840c3842058b86ab',
             'name': 'anotherdomain'
@@ -245,6 +245,7 @@ PROJECT_SCOPED_TOKEN = {
             },
             'id': 'c4da488862bd435c9e6c0275a0d0e49a',
             'name': 'exampleuser',
+        },
         'roles': [
             {
                 "id": "76e72a",
@@ -261,7 +262,6 @@ PROJECT_SCOPED_TOKEN = {
                 "name": "member"
             }
         ],
-        },
         'project': {
             'domain': {
                 'id': '4e6893b7ba0b4006840c3845660b86ed',