Setup CI for automatic testing

[MrMinos]

Do not merge yet!

• We can use GitLab or TravisCI, I have no preference, GitLab had a smaller barrier for me to get going
• I would like to see each teams having at least one model test that they would like to run automatically, so that we can do the "real thing"
• Would need to resolve dependencies as teams add their own pytest cases; as well as once we figure out what the simulator tests will look like

[AVSurfer123]

@MrMinos Where is this CI being run? It looks like you have some type of server set up for it to access? Also I'm assuming GitLab works with Docker right?

[MrMinos]

@AVSurfer123 Sorry I was MIA past two weeks.

Currently there is no CI running. This PR contains .yml file for using GitLab's CI, but I remember us having discussions in the meeting about using Travis CI.

I will have to catch up on the current simulation setup with Jenny and et al, and we should discuss the best path forward.

My current thought for CI automated simulations is, we would not want a graphical output. We would purely want numerical simulations in the CI pipeline.