SurveySample -> CommCareCaseGroup in reminders/forms.py
migrate SurveySample -> CommCareCaseGroup in usages inside reminders/models.py
SurveySample => CommCareCaseGroup in reminders/util.py
removed SurveySample from import list and reformatted list
Rename SurveySample to CommCareCaseGroup and make sure all references get touched in reminders/views.py
Merge branch 'master' of github.com:/dimagi/commcare-hq into surveysample-rename
Merge branch 'master' of github.com:/dimagi/commcare-hq into surveysample-rename
Merge pull request #1141 from dimagi/surveysample-rename

Use CommCareCaseGroup instead of SurveySample