CLC-4245: make smarter use of test UIDs
CLC-4245: sample JSON file
OEC-374, refactor naming course_evaluations -> courses (incl. rake task, readme)
Merge pull request #2961 from pfarestveit/clc-4245

CLC-4245: make smarter use of test UIDs
Merge pull request #2962 from johncrossman/OEC-374

OEC-374, refactor naming course_evaluations -> courses