change how we reference django users for XQUEUE

unfortunately the old syntax doesn't work with ansible 1.4, here is the error we see when the template is rendered:

```
TASK: [create xqueue auth file] *********************************************** 
<localhost> EXEC ['/bin/sh', '-c', 'mkdir -p $HOME/.ansible/tmp/ansible-1390427213.61-269554655530108 && chmod a+rx $HOME/.ansible/tmp/ansible-1390427213.61-269554655530108 && echo $HOME/.ansible/tmp/ansible-1390427213.61-269554655530108']
fatal: [localhost] => Traceback (most recent call last):
  File "/home/jarv/.virtualenvs/ansible-1.4/local/lib/python2.7/site-packages/ansible/runner/__init__.py", line 394, in _executor
    exec_rc = self._executor_internal(host, new_stdin)
  File "/home/jarv/.virtualenvs/ansible-1.4/local/lib/python2.7/site-packages/ansible/runner/__init__.py", line 485, in _executor_internal
    return self._executor_internal_inner(host, self.module_name, self.module_args, inject, port, complex_args=complex_args)
  File "/home/jarv/.virtualenvs/ansible-1.4/local/lib/python2.7/site-packages/ansible/runner/__init__.py", line 685, in _executor_internal_inner
    result = handler.run(conn, tmp, module_name, module_args, inject, complex_args)
  File "/home/jarv/.virtualenvs/ansible-1.4/local/lib/python2.7/site-packages/ansible/runner/action_plugins/template.py", line 91, in run
    local_md5 = utils.md5s(resultant)
  File "/home/jarv/.virtualenvs/ansible-1.4/local/lib/python2.7/site-packages/ansible/utils/__init__.py", line 523, in md5s
    digest.update(data)
TypeError: must be string or buffer, not dict
```