Silence uninstall step for rubygems

Because we now defensively always try to uninstall old versions, we don't want to confuse people by showing the 'Gem not installed' message if there are no older versions.

Author: nmburgan

configs/components/_base-rubygem.rb

@@ -40,7 +40,7 @@
 pkg.install do
   steps = []
   # Attempting to uninstall a default gem this way will fail, so ignore failures
-  steps << "#{gem_uninstall} --force #{name} || true"
+  steps << "#{gem_uninstall} --force --silent #{name} || true"
   steps << "#{settings[:gem_install]} #{name}-#{version}.gem #{gem_install_options || ''}"
   # If we are installing a newer version of a default gem, we need to remove the existing
   # specification file so that we don't get warnings. The corresponding gem directory is