add dummy device to greatly speed up tests!
Add 20 minute (but configurable) default timeout to user sessions.
Add option to disable session timeout by setting = 0.
add tests for group deletion
Merge pull request #2160 from aronasorman/delete-group-tests

Delete group tests
Fixes linting.
in tests: wait longer for the facility or group deletion to happen
Adds test for session timeout.
Merge pull request #2159 from rtibbles/session_timeout

Timeout Django sessions