context: add auth token to context

For tacker server to call other openstack servers like nova

Change-Id: I52bd64e2aea61ab3a9307351ef943fdf7a6074bf

tacker/auth.py

@@ -50,10 +50,14 @@ class TackerKeystoneContext(wsgi.Middleware):
         # Use request_id if already set
         req_id = req.environ.get(request_id.ENV_REQUEST_ID)
 
+        # Get the auth token
+        auth_token = req.headers.get('X_AUTH_TOKEN',
+                                     req.headers.get('X_STORAGE_TOKEN'))
+
         # Create a context with the authentication data
         ctx = context.Context(user_id, tenant_id, roles=roles,
                               user_name=user_name, tenant_name=tenant_name,
-                              request_id=req_id)
+                              request_id=req_id, auth_token=auth_token)
 
         # Inject the context...
         req.environ['tacker.context'] = ctx

tacker/context.py

@@ -41,7 +41,7 @@ class ContextBase(common_context.RequestContext):
     def __init__(self, user_id, tenant_id, is_admin=None, read_deleted="no",
                  roles=None, timestamp=None, load_admin_roles=True,
                  request_id=None, tenant_name=None, user_name=None,
-                 overwrite=True, **kwargs):
+                 overwrite=True, auth_token=None, **kwargs):
         """Object initialization.
 
         :param read_deleted: 'no' indicates deleted records are hidden, 'yes'
@@ -56,7 +56,8 @@ class ContextBase(common_context.RequestContext):
         """
         super(ContextBase, self).__init__(user=user_id, tenant=tenant_id,
                                           is_admin=is_admin,
-                                          request_id=request_id)
+                                          request_id=request_id,
+                                          auth_token=auth_token)
         self.user_name = user_name
         self.tenant_name = tenant_name
 
@@ -132,6 +133,7 @@ class ContextBase(common_context.RequestContext):
                 'tenant_name': self.tenant_name,
                 'project_name': self.tenant_name,
                 'user_name': self.user_name,
+                'auth_token': self.auth_token,
                 }
 
     @classmethod