Small change to prevent an NPE where there's an error earlier in the validation, such that you don't get all the validation messages back from the server.
Merge branch 'develop' of https://github.com/Sage-Bionetworks/BridgePF into studies
Fixes in validation based on the errors I'm seeing coming back creating surveys
Merge branch 'develop' of https://github.com/Sage-Bionetworks/BridgePF into studies
Disabling multi-threading while schedules are not updating on development
Merge pull request #344 from alxdarksage/studies

Mostly validation changes; disabling multi-threading for schedule generation
Merge pull request #345 from eric-wu/develop

Backfill study certificates
Merge pull request #347 from eric-wu/develop

Remove the backfill group
Heroku deployment failed. Retry it.
Merge branch 'develop' of https://github.com/Sage-Bionetworks/BridgePF into develop