ets-berkeley-edu/calcentral — pull request #1497 by raydavis (2013-08-26 19:36:29+00:00)
Title: CLC-2385 Handle section enrollment statuses other than E and W in Canvas import

https://jira.media.berkeley.edu/jira/browse/CLC-2385

Also skip "Dropped" enrollment records (should any show up), and avoid null Canvas site roles under any circumstances.