Add optional region field to certification form

[giverm]

Ticket

Resolves #69

Changes

Adds a region select dropdown to the demo/certifications/new form that allows users to optionally specify a region when creating certifications. Region data flows through the form to RequirementParams to Requirements and is validated against a list of regions currently assigned to users.

Testing

Selecting a region

Without a region

Preview environment for reporting-app

• Service endpoint: https://p-82-reporting-app-dev-437680950.us-east-1.elb.amazonaws.com
• Deployed commit: 969e16b

[lorenyu]

@giverm the ticket is still being refined, take a look at the convo there

[giverm]

@giverm the ticket is still being refined, take a look at the convo there

@lorenyu, sorry about that, I had done this work yesterday prior to the discussion, but wanted to push it up this morning for it to be visible. I've marked it as a draft so it won't be merged until the ticket is complete

[lorenyu]

@giverm got it no worries