Screen data privacy notification not being resent after expiration date override

[seanderickson]

When the data privacy expiration date is manually adjusted, the users associated with the screen are not being re-notified before the subsequent expiration.

It appears that the issue is here: https://github.com/hmsiccbl/screensaver/blob/master/core/src/main/java/edu/harvard/med/iccbl/screensaver/service/screens/ScreenDataSharingLevelUpdater.java#L280

• in that either the s.setDataPrivacyExpirationNotifiedDate(null) is not being commited by saving the update, or the logic is in error for this clause.

See: screen 1066:

• users notified of the original expiration on
  10/11/2013
• Earliest Allowed Data Privacy Expiration Date set to '2014-12-10' on 10/28/2013
• no subsequent notification appears to have been sent before 2014-12-10

@JAS60