Add :special-members: directive to automodule in docs

This patch set adds :special-members: [0] directive to automodule
command in Patrole docs, in order to correctly render documentation
like [1] which is quite important. It won't show up without
this directive [2].

[0] http://www.sphinx-doc.org/en/master/usage/extensions/autodoc.html#directives
[1] https://github.com/openstack/patrole/blob/337a574ad88b9158a77d18548b6fe809e4c8f353/patrole_tempest_plugin/policy_authority.py#L37
[2] https://docs.openstack.org/patrole/latest/framework/policy_authority.html#module-patrole_tempest_plugin.policy_authority

Change-Id: I2a69f52e903f57cced3f5ace3ec6aab3620a4e63
5 files changed