Change the way we do with_items to make them happen next to each other in runner, which eliminates the problem of with_items and vars_files sometimes not playing  nice with each other.

(Also a fix for the user module error handling when the user
is not present at the time of the return.  This can only really be caused by multiple ansible executions).

Added yes/no to user options instead of False comparison for force and remove options for user module

The user module now returns the output, both stdout and stderr, from
useradd, usermod, and userdel.  This should help debug cases why one of
those commands fail.  In addition, the user module will now call
fail_json() when the attempted command failed so as to properly
communicate a failure in a playbook.

I think when we stopped using stderr for debugging modules because
paramiko didn't like it, many modules used the idiom of defining
a debug function that used standard error. The def's and calls were
removed.

This looks like a stray debug() that didn't get removed and didn't
show up unless you alter a user's groups. If it's hit, 'user' fails
with a global undefined function error.

Resolves issue #333.  If spwd is not available, the password will
be set regardless.

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.

This adds some logic when usings groups possibly in combination with append

  if just specifying groups and the current groups do not match the list
     set groups
  if specifying groups with append and any group thats not in the current groups
     set groups with -a

Code was adding '-a' even when the user was already in the desired groups causing usermod to fail since there was no '-G' option. This is duplicate code (3 lines) from the 'group' section, so could be improved, but it works.

Groups are not necessarily returned in the defined order, especially when the user already existed before ansible started managing the system.

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.

treated -D as a way to show stderr, and make sure modules don't include things on stderr.
Update docs and test module script to come into line.

This adds two options to the user module: groups and append.  groups is
a comma-delimited list of supplementary groups a user should belong to.
If a user is currently a member of a group not listed in groups, the
user will be removed from it.  To change this behavior, use append=yes.
This will append the user to the list of supplementary groups and *not*
remove the user from unlisted groups.

This changes the gid option to group.  One may provide a primary group
as either a gid or a name.  The module will then check to verify that
the group already exists.  If the group does not already exist, the
module will fail.

This relies on useradd, usermod, and userdel utilities on the system.
The argument name is required; if state is not provided, present is
assumed.  Other options supported for creating or modifying an existing
account:  uid, gid, comment, home, shell, and password.  If managing the
password, it must already be encrypted.  When creating an account, you
can also provide the argument createhome to control whether the home
directory is created.  Arguments supported for deleting an account are:
force (remove account even if user is logged in) and remove (remove home
directory).