Revert "Redmine issue: http://www.redmine.org/issues/14590"

This reverts commit e14fd40916ca0d197ad0b4f4df23880a7a242573.
Fixed that Mantis/Trac users are not imported because of password too short (#14590).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12163 e93f8b46-1217-0410-a6f0-8f06a7374b81
(cherry picked from commit 5e2eedf2c5fd6a4732fd9c6507145c4aa0761c67)