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

WS-195, WS-76: Notification System now working and sending emails on request submission and completion

Charlotte Hausman authored 4 years ago and Nathan Hertz committed 4 years ago

Messaging system is now running on a more robust foundation:
- `kombu` package for AMQP networking
- New Messenger and Router objects
- New message format
- Easy-to-use callback subscribing
- Can now get messages anywhere in the system easily and send replies back easily

Updated `testing/utils/conftest.py` with reliable mock data that can be used in tests; added `shared/workspaces` tests

- Added PATH_PREFIX variable to build stage to handle dockerfiles at paths other than /services
- removed .unit-test template from .gitlab-ci.yml because it was duplicated

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

added ability to receive json data, fill a dummy template, and send the filled template in an email.