Fixed gate by Updating Gemfile to pin Rake to 10.1.1
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: I8a2c9ff2b33d7fda7818d063fd5a855284aaf089

syseleven/puppet-heat