WIP: Add support for per-job Docker network creation

What does this MR do?

Add support for per-job Docker network creation, based on !609 (closed). Successfully tested in our company's production CI environment.

Why was this MR needed?

There is a huge need of proper service discovery b/w the job container and the service container(s).

Are there points in the code the reviewer needs to double check?

Does this MR meet the acceptance criteria?

• Documentation created/updated
• Tests
  • Added for this feature/bug
  • All builds are passing
• Branch has no merge conflicts with master (if you do - rebase it please)

What are the relevant issue numbers?

Based off of !609 (closed)

Closes #1042 (closed)