MB-11572: CloseAllStreams before deleting them

Context: UprConsumer's deconstructor

Change-Id: Ifc5560ba3642989ae2d5edd4a3c63b7d0e6f57f5
Reviewed-on: http://review.couchbase.org/38888
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>