Courses model test did not match MongoDB schema

Need to remove/rewrite courses.server.model.test.js file to properly
match db schema. Courses model test was causing errors in current state.
Merge branch 'master' of https://github.com/brianroytman/cen3031-project

I'm pulling to have access to Kyle's most recent code update.
Merge branch 'master' of https://github.com/brianroytman/cen3031-project