Externalize dependency on ENV vars for regression testing

[SubPointSupport]

Regression testing depends on a bunch of ENV vars to get things configured: account, password, provision mode, libraries and so on. As the list of vars expanded, it has become hard to manage and modify them. Also, there is no centralizedand easy way to get "teting profiles" config files.

It might be a good idea to remove dependency on ENV vars introducing a special service with the following logic:

• look for ENV vars
• if there is a local YAML file - use override from YAML file

That way we would be able to easily create, edit and share config ENV for regression testing.