* add start of bulk upload logs journey
* split upload controller into 2
* add year page to bulk upload journey
* bulk upload years now dynamic
* add placeholder for upload your file page
* handle bulk upload when not in crossover
* add bulk upload csv user journey
* bulk upload now persists and sends to S3
* swap ruby-filemagic for file command
* match csv or text file for validation
* in_crossover_period? now uses overlap of forms
- also moved from Form to FormHandler
* add production env var for CSV bucket
* stub kernel call methods
* remove duplicate env var
* hardcode env var for review apps
* move feature toggle to FeatureToggle
* crossover period checks now specific to the form
* fix typo in bulk upload journey
Manny Dinssa
Phil Lee