Allow deploying directly to the current route

[sampaccoud]

Feature Request

In some cases (like deploying to the staging or preprod environment, or while debugging), going through a deploy and a switch is a useless loss of time. We could deploy directly to the current branch.

Describe the solution you'd like
Add an environment variable "bypass_blue" that when set to "true" will cause the deploy playbook to connect the new stack to the current route.