UPdating quotas no longer works.

Actual:
1. Go to /syspanel/tenants/
2. Hover over 'Edit' and click 'Modify Quotas' from the dropdown Menu.
3. Make changes, and submit modal form.
4. Failure, get traceback with error "Value: get_object() got multiple values for keyword argument 'tenant_id'" (reprinted below)

Expected:

1. Go to /syspanel/tenants/
2. Hover over 'Edit' and click 'Modify Quotas' from the dropdown Menu.
3. Make changes, and submit modal form.
4. Success

Traceback:

Request Method: POST
Request URL: /syspanel/tenants/24/quotas/

Traceback:
File "/usr/lib/pymodules/python2.7/django/core/handlers/base.py" in get_response
  111. response = callback(request, *callback_args, **callback_kwargs)
File "/opt/stack/horizon/horizon/horizon/decorators.py" in dec
  41. return view_func(request, *args, **kwargs)
File "/opt/stack/horizon/horizon/horizon/decorators.py" in dec
  73. return view_func(request, *args, **kwargs)
File "/opt/stack/horizon/horizon/horizon/decorators.py" in dec
  41. return view_func(request, *args, **kwargs)
File "/usr/lib/pymodules/python2.7/django/views/generic/base.py" in view
  47. return self.dispatch(request, *args, **kwargs)
File "/usr/lib/pymodules/python2.7/django/views/generic/base.py" in dispatch
  68. return handler(request, *args, **kwargs)
File "/opt/stack/horizon/horizon/horizon/forms/views.py" in post
  75. return self.get(self, request, *args, **kwargs)
File "/opt/stack/horizon/horizon/horizon/forms/views.py" in get
  62. self.object = self.get_object(*args, **kwargs)

Exception Type: TypeError at /syspanel/tenants/24/quotas/
Exception Value: get_object() got multiple values for keyword argument 'tenant_id'