Add hotfix as a valid option to opscode rubygems regex.
Add hotfix as a valid option to opscode rubygems regex.

chef/opscode-omnitruck,glennmatthews/opscode-omnitruck,chef/omnitruck,glennmatthews/opscode-omnitruck,chef/opscode-omnitruck,rhass/opscode-omnitruck,chef/opscode-omnitruck,juliandunn/opscode-omnitruck,juliandunn/opscode-omnitruck,juliandunn/opscode-omnitruck,rhass/opscode-omnitruck,rhass/opscode-omnitruck,chef/omnitruck,glennmatthews/opscode-omnitruck,chef/omnitruck