Add spec for Bug 920028.
Mark the failing spec as pending.
Bug 920028.

Notice that we override Commander::Command#parse_options_and_call_procs
  - in particular, we add '--help' as a valid command option when '--h'
    is passed.
  - note that '--h' exists in @args for the present RHC::CommandRunner,
    but it is not removed from @args in #run!.
  - #run! calls Command#run, which ends up calling
    Command#parse_options_and_call_procs, which adds '--help' again,
    since '--h' was not removed from @args, and thus passed back to
    parse_options_and_call_procs.
  - Infinite recursion ensues.
  - So, we need to defend ourselves by removing all potential matches
    for the command option '--help'.
This spec now passes.
Merge pull request #331 from BanzaiMan/dev/hasari/bz920028

Bug 920028