We probably want the greenlet running the sync fn to also use self.retry_fail_classes.

Summary:
This way, when the EAS sync monitor encounters EAS exceptions a retry won't help with
(for e.g. during provisioning), we don't.

Test Plan: None.

Reviewers: emfree

Reviewed By: emfree

Differential Revision: https://review.inboxapp.com/D534