Manually mock service_catalog in stub_keystoneclient

MockObject.__init__ ignores properties, fixes:

FAIL: test_get_default_role (openstack_dashboard.test.api_tests.keystone_tests.RoleAPITests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/var/lib/openstack-dashboard-test/openstack_dashboard/test/api_tests/keystone_tests.py", line 78, in test_get_default_role
    keystoneclient = self.stub_keystoneclient()
  File "/var/lib/openstack-dashboard-test/openstack_dashboard/test/helpers.py", line 287, in stub_keystoneclient
    self.keystoneclient = self.mox.CreateMock(keystone_client.Client)
  File "/usr/lib64/python2.6/site-packages/mox.py", line 258, in CreateMock
    new_mock = MockObject(class_to_mock, attrs=attrs)
  File "/usr/lib64/python2.6/site-packages/mox.py", line 556, in __init__
    attr = getattr(class_to_mock, method)
  File "/usr/lib64/python2.6/site-packages/mox.py", line 608, in __getattr__
    raise UnknownMethodCallError(name)
UnknownMethodCallError: Method called is not a member of the object: service_catalog
>>  raise UnknownMethodCallError('service_catalog')

(cherry picked from commit 82bdecb117877bc0bd1bbd553fbd40d04cbe9078)

Temporary change the django_openstack_auth requirement

The new django_openstack_auth version causes gate job issues like:
http://logs.openstack.org/33618/5/gate/gate-tempest-devstack-vm-full/29950/console.html

Temporary disabling the 1.1.0 version.

(from commit 2ffe032dbf21757bd574dedffa3cd3f6927bbfe3)

Mock some more keystoneclient.Client properties for mox

Fixes LP bug 1196823

(cherry picked from commit 2a6d669443b817ced3a98f5bc60a066298b6e40e)

Sync pytz from requirements.txt

pip 1.4 is imminent, and doesn't install pre-release versions if you
don't ask for them - this includes the date-based version of pytz.

Grizzly: cherry-picked from commits 82bdecb117, 2ffe032dbf, 2a6d669443, 5abe67709c
Folsom: cherry-picked from commits 47ea6801e9, a1b23d62cd31

Conflicts:
	tools/pip-requires

Change-Id: I9b0c56eda95ee83cf56a28f2f1b7316ad2592fa2