MB-10264: Added more logging for mccouch connection

More logging for send and receive data from mccouch
in Couch-Notifier

Change-Id: I6a6817f207772132000ec11901d1fc1de91156b9
Reviewed-on: http://review.couchbase.org/33916
Tested-by: David Liao <david.liao@couchbase.com>
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>