added in the CHANGES.txt the issue solved by Luis Cabaceira for supporting content migration in the Filesystem connector (CONNECTORS-1462)

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-1356-2.7.1@1828881 13f79535-47bb-0310-9956-ffa450edef68
1 file changed