Cleanup of finders with :conditions option.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11963 e93f8b46-1217-0410-a6f0-8f06a7374b81
Preload boards projects.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11964 e93f8b46-1217-0410-a6f0-8f06a7374b81
Adds User#builtin_role.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11965 e93f8b46-1217-0410-a6f0-8f06a7374b81