acu157857 - update RubyGems repose pring friendly message if it not available
acu157857 - remove error/stdout redirect for system command
acu157857 - code review update
Merge pull request #350 from rightscale/ivory_14_06_acu157857_fail_with_friendly_message_if_rubygems_not_installed

acu157857 - verify if rubygems is install during RubyGems repository set...