"OT approved" email bug fix

[DanielRyanSmith]

This change fixes a bug related to the automated email sent when an origin trial is approved. The incorrect arguments were supplied for the build_email method.

[jrobbins]

Why didn't mypy catch this?

[jrobbins]

Why didn't mypy catch this?

Ah, the body of process_post_data() was not checked because that function does not have any type info in its signature. We should probably add a bunch more return types throughout our existing code.

[DanielRyanSmith]

Why didn't mypy catch this?

I think this is because the feature and contacts variables are technically returned as untyped. This may have been flagged by mypy if I explicitly gave a type to these two vars.