removed EXPOSE cmd in frontend's Dockerfile.dev and added empty dependencies to CI stages that don't need artifacts for efficiency

updated coveragerc config files to reflect changes to the shared packages location and modified run-tests.sh

All enabled tests are now true unit tests with no external dependencies; new `requirements.txt` file in `test/` that installs testing requirements (`pytest`, `pytest-mock`, etc.); and `run-tests.sh` now has an extra step that installs these

Added run-tests.sh script to each service to run our package tester to enable us
to run unit tests from the cmdline and CI
Refactored makefile's make test script to call run-tests.sh in each image

Also, added more failfast options to the boot-local scripts