* Included support to AIX group subsystems
AIX systems has subsystems as services but also uses group
subsystems.
For example, spooler is a group subsystem to services
qdaemon, writesrv, and lpd.
This change enables the possibility to use also the group
susbsystmes such as spooler, nfs, etc.
When the service name is informed, first the module will
check if the name is a subsystem, if not it will check if
the name is a group subsystem and also it subsystems states.
This change makes services more flexible with AIX systems.
* Included test/legacy/aix_services.yml for tests
As discussed on IRC ansible-devel channes, was include the
legacy tests for further manual tests.
