Removed dead code, Rails4 handles that in its attribute writer.

git-svn-id: http://svn.redmine.org/redmine/trunk@13716 e93f8b46-1217-0410-a6f0-8f06a7374b81
Un-inline statement.

git-svn-id: http://svn.redmine.org/redmine/trunk@13717 e93f8b46-1217-0410-a6f0-8f06a7374b81
Adds a few functional tests.

git-svn-id: http://svn.redmine.org/redmine/trunk@13718 e93f8b46-1217-0410-a6f0-8f06a7374b81