Gemfile: update Rails to 4.1.7

git-svn-id: http://svn.redmine.org/redmine@13529 e93f8b46-1217-0410-a6f0-8f06a7374b81
2.6-stable: Gemfile: update Rails to 3.2.20

git-svn-id: http://svn.redmine.org/redmine@13530 e93f8b46-1217-0410-a6f0-8f06a7374b81