Ignore OrmDuplicateKeyException during PUT .../reviewed

If the reviewed flag has already been set for the calling user return
200 OK instead of throwing a 500 error at the client.  This condition
can be caused by a race between the getExisting() call and the
database write being completed.

Change-Id: I1e4c6391cf7e3cfed280dee6abd749fb0934dec0
1 file changed