Merge pull request #71 from chamilo/1.9.x

1.9.x
Updating field when login is email -refs #7261
Merge branch 'yoselyn.7261' of https://github.com/ycastillo/chamilo-lms into ycastillo-yoselyn.7261
Merge branch 'ycastillo-yoselyn.7261' into 1.9.x