* Rename fail_on_rc_non_zero to check_rc, much more succinct.
* Simplify method defintion
* Fix command module and drop shell=shell option; whether to use
shell is determined by if args is a list.
This updates apt, apt_repository, command, cron, easy_install, facter,
fireball, git, group, mount, ohai, pip, service, setup, subversion,
supervisorctl, svr4pkg, user, and yum to take advantage of run_command
in module_common.py.
- Added username, password arguments.
- Documented existing revision argument.
- Corrected documentation/docstrings; removed git references, use svn
nomenclature, etc.
- Refactored duplicate code, redundant shell calls, filter abuse,
inconsistent formating, etc.
- Shell quoting so it doesn't break for one guy who has spaces in
pathnames.
- svn called with '--non-interactive' and '--no-auth-cache'.
