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: I054da626e6aa49f70e1c00e49454aa53f541b813
Partial-Bug: 1349865