edx/edx-ora — pull request #151 by waheedahmed (2013-12-16 10:58:14+00:00)
Title: Skipped calibration essays set next_grader_type equal to preferred_grade...

ORA-198
Set next_grader_type = sub.preferred_grader_type for skipped calibration essays.
Added two tests one for ML grading and one for PE grading.
@symbolist @adampalay