Issue #2940413: Camelcases dockerNetwork, and checks for its existance before attempting to clean it up

Issue #2851000: Converts ancillary source dir into an ancillary working dir for everything to utilize

Issue #2489530: Adds execSource directory and the artifacts directory so that we can bind mount abstractions and not hard coded paths everywhere

Issue #2823608: Terminates running containers, and removes source/database directories after build. Cleans up after itself.

Issue #2823608: reduces servicecontainers and execcontainers to one of each. There is no collection of containers in our build

Issue #2819938: Moves container working to Environment and lays groundwork for Codebase and Build environment