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: I8aefcb9bba56f7413f07209c0f658dc96da9f375
Partial-Bug: 1349865