Add integration tests for group_by module. Fixed bug introduced by ansible/ansible#7273 while also fixing issue described in ansible/ansible#6953
Close fds when running commands from the accelerate daemon

Fixes #7307
Merge branch 'devel' of https://github.com/cchurch/ansible into cchurch-devel
[test_apt_repository] Verify that 'python-apt' auto-installs correctly

Remove 'python-apt' before testing the 'apt_repository' module.  The
'apt_repository' module has the smarts to auto-install python-apt.  The
integration test will now assert the correct auto-install behavior.
Close fds when running commands from the accelerate daemon

Fixes #7307
Merge branch 'cchurch-devel' into devel