Model Gremlin Process tests.
Merge remote-tracking branch 'origin/master'
Reformat ExceptTest to new model.
Compliance for Gremlin process tests are no longer relevant.
Allow tests to load different graphs if needed.
Refactor Filter test to new model.
Refactor HasTest to use new test model.
Refactor interval test to new model.
Refactor range test to new model.
Refactor retain test to new model.
Pus toy graph loading down to AbstractGremlinTest.
Refactor back test to new model.
Refactor Jump test to new model.
Refactor order test to new model.
Refactor Path test to new model.
Refactor select test to new model.
Refactor traversal test to new model.
Refactor Value test to new model.
Refactor aggregate test to new model.
Refactor group by test to new model.