CDH-19592: Fix broken Release() in case of a reservation timeout.

Change-Id: Ib82e8ca33cf7c7a585e09442106174cfb0ae35c6
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2891
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2933