Takes a lot of the fixes to the user module and applies them to the
group module: provide stdout/stderr in result if available and call
fail_json() if the attempted action fails.
The ohai and facter modules use /usr/bin/logger to log the fact that
they have been invoked. I added 'import os' to the ping module
so that it could have the same syslog statements as the other modules.
I separated the condensed:
shlex.split(open(argfile, 'r').read())
into two separate statements similar to the other modules.
Creates system accounts/groups; corresponds to the '-r' option for {user,group}add.
The option is only honored when users/groups are added, not when modified.
This relies on groupadd, groupmod, groupdel, and gpasswd utilities on
the system. You can optionally modify the gid for the group. You can
also add/remove a user to/from a group with the option member. Member
state is defined with the option memberstate.
