bump moodle2cc to 0.2.16

test plan:
* import the package referenced in the ticket
* the questionnaire question should have yes/no choices

fixes #CNVS-15606

Change-Id: I21bc5cc679524dd45adf2b178d6783f7e58ed5dc
Reviewed-on: https://gerrit.instructure.com/41276
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jeremy Stanley <jeremy@instructure.com>
Product-Review: Jeremy Stanley <jeremy@instructure.com>
QA-Review: Clare Strong <clare@instructure.com>