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: Id43f3f30491c899cee9b8cecec2f755f014a08b1

redhat-cip/puppet-vswitch,squarit/puppet-vswitch,openstack/puppet-vswitch,openstack/puppet-vswitch,plumgrid/puppet-vswitch,oeudtinsanmie/puppet-vswitch,rdo-puppet-modules/puppet-vswitch