Serialize using to_json on fields
Count & compare db hits between old and split mongo
LMS-11090
check 0 sends means 0 not ignore
Move test_path_to_location to mixed testing
Convert toc test to use mongo not xml ms
Included adding a general create_toy_course and create_sample_course method for tests
Test both split and old mongo
fixup! Test both split and old mongo
fixup! Count & compare db hits between old and split mongo LMS-11090
Merge pull request #4542 from edx/split/perf_test

Split/perf test