[V3 Admin] Rewrite of Squid-Plugins Admin cog (#825)

* Add/remove roles

* Announcement

* Edit role stuff

A bit of refactoring

* Selfrole stuff

* Add announce ignore capabilities

* announce configurations

Announcement fixes

* Serverlock initial commit

* Add some admin tests

better test

* Update for new config

* Add user hierarchy checks

* Fix tests

* Update from rebase

* Fix config getter

* Fix async getters/selfrole

tests/conftest.py

@@ -24,6 +24,13 @@ def override_data_path(tmpdir):
     data_manager.basic_config['DATA_PATH'] = str(tmpdir)
 
 
+@pytest.fixture()
+def coroutine():
+    async def some_coro(*args, **kwargs):
+        return args, kwargs
+    return some_coro
+
+
 @pytest.fixture()
 def json_driver(tmpdir_factory):
     import uuid