Fix bundle install args when using distro packaged rubygems
Stop bluepill itself after stopping the crowbar app
Refresh Gemfile.lock before (re)starting the crowbar app

This is required for systems where rubygems are packaged and installed into the
system locations in case any of the required gems has seen an update.
Merge pull request #454 from rhafer/fix/bundle-install

Merged by devtool for VictorLowther