Remove 'openstack/common/context.py'

context.py is not used anywhere in Glance. Consequently, we can get
rid of it.
Also, context.py is the only file left using uuidutils.

Change-Id: I657e20ac39fbace60f230652912a4bf792836206
Closes-Bug: #1253497

glance/openstack/common/context.py

@@ -1,82 +0,0 @@
-# vim: tabstop=4 shiftwidth=4 softtabstop=4
-
-# Copyright 2011 OpenStack Foundation.
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-"""
-Simple class that stores security context information in the web request.
-
-Projects should subclass this class if they wish to enhance the request
-context or provide additional information in their specific WSGI pipeline.
-"""
-
-import itertools
-
-from glance.openstack.common import uuidutils
-
-
-def generate_request_id():
-    return 'req-%s' % uuidutils.generate_uuid()
-
-
-class RequestContext(object):
-
-    """
-    Stores information about the security context under which the user
-    accesses the system, as well as additional request information.
-    """
-
-    def __init__(self, auth_token=None, user=None, tenant=None, is_admin=False,
-                 read_only=False, show_deleted=False, request_id=None):
-        self.auth_token = auth_token
-        self.user = user
-        self.tenant = tenant
-        self.is_admin = is_admin
-        self.read_only = read_only
-        self.show_deleted = show_deleted
-        if not request_id:
-            request_id = generate_request_id()
-        self.request_id = request_id
-
-    def to_dict(self):
-        return {'user': self.user,
-                'tenant': self.tenant,
-                'is_admin': self.is_admin,
-                'read_only': self.read_only,
-                'show_deleted': self.show_deleted,
-                'auth_token': self.auth_token,
-                'request_id': self.request_id}
-
-
-def get_admin_context(show_deleted="no"):
-    context = RequestContext(None,
-                             tenant=None,
-                             is_admin=True,
-                             show_deleted=show_deleted)
-    return context
-
-
-def get_context_from_function_and_args(function, args, kwargs):
-    """Find an arg of type RequestContext and return it.
-
-       This is useful in a couple of decorators where we don't
-       know much about the function we're wrapping.
-    """
-
-    for arg in itertools.chain(kwargs.values(), args):
-        if isinstance(arg, RequestContext):
-            return arg
-
-    return None