oauth2: Forces UTC in consent strategy (#775)
oauth2: Forces UTC in consent strategy (#775)

This resolves an issue when different timezones are used between systems
by enforcing UTC everywhere.

Closes #679
ory/hydra,ory-am/go-iam,ory/hydra,ory/hydra,ory-am/hydra,ory-am/go-iam,ory/hydra