Setting up repo for master Juno Branch

* Update metadata version
* Removing Strainer file
* Adding Gemfile.lock to .gitignore
* Updating Gems
  * chef (11.12.0)
  * chefspec (4.0.0)
  * rspec (3.0.0)

Change-Id: Ieb52192f260af5ade1cfd535bbf90e0bb9ed65eb
Partial-Bug: 1349865