Do not send Travis CI notifications to common list

Change-Id: Id66a3798c438818ada61557cde8d539f499d727a
Reviewed-on: http://review.couchbase.org/28022
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>