Adjust test for r11120 (#3436).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11123 e93f8b46-1217-0410-a6f0-8f06a7374b81
Adds a custom validator for dates (#12736).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11124 e93f8b46-1217-0410-a6f0-8f06a7374b81
Negative estimated hours should not be valid (#12735).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11125 e93f8b46-1217-0410-a6f0-8f06a7374b81