Merge pull request #272 from alxdarksage/validators

Fixing build; schedules only created for users enrolled in a study
Up the DynamoDB capacity to the newly updated free tier.
Consolidate health ID encryption into AccountEncryptionService.
Merge pull request #273 from eric-wu/develop

Up the DynamoDB capacity to the newly updated free tier
Merge pull request #274 from eric-wu/js

Consolidate health ID encryption into AccountEncryptionService
Updating to develop