Setting up repo for master Juno branch

* Update metadata versions
* Updates for icehouse specific attributes
* Removing Strainer file
* Updating Gems
  * chef (11.12.0)
  * chefspec (4.0.0)
  * rspec (3.0.0)
* Cleanup specs for 4.x

Change-Id: Ibb18b6a2a523c123ffd96f14cc81d958a308b313
Partial-Bug: 1349865