[#46311371] Refactoring aws configuration template to a class for AWS bootstrap
[#46311371] Loading vpc domain name for aws bootstrap from environment variable
Revert "Removed remaining extraneous bundle exec's"

We need to make sure we're loading BOSH from the workspace
in the specs, instead of the locally installed bosh gem.
This assures that we are running the tests with the lastest code
in the repo.

This reverts commit 19a8cf45337f7857af82a519608c528f830c4c6f.