Add a function to the StreamEndError to check for stream end ok
Add a function to the StreamEndError to check for stream end ok

Change-Id: I982dc055bddb1fc10bd2bbd49bff66c45933ca4d
Reviewed-on: http://review.couchbase.org/56755
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>
Tested-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>

brett19/gocb