Rename tapconnmap to connmap since it handles both dcp and tap

Change-Id: I698a2bfe62ab4dec5e64934de845611d49860041
Reviewed-on: http://review.couchbase.org/40993
Reviewed-by: abhinav dangeti <abhinav@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>