Fixed gate by Updating Gemfile to pin Rake to 10.1.1

The latest Rake update requires Ruby >= 1.9. Bundler in the
current gate uses 1.8.x. This update fixes the gate by pinning
Rake to the last known working version.

Change-Id: Idf75f487cfc20fe2b2af55af59cdeab7c774f62e
Merge git://github.com/puppetlabs/puppetlabs-glance