The code for traffic groups was not being tested and therefore
had errors associated with it. It is now covered in coverage tests
and bugs that were found in it have been fixed.
See this issue for details
https://github.com/F5Networks/f5-ansible/issues/28
This parameter can be used to open up access to (among other things)
the mgmt address of a BIG-IP. It is necessary for configuring bigips
in an HA configuration.