update rails to 3.2.21
Merge pull request #2221 from opf/hotfix/release-4.0-rails-3.2.21

update rails to 3.2.21 (4.0 release)
Merge branch 'release/4.0' into dev
Amend gulp express task to use next available port

If a given port is in use, increment.
Also, make Protractor aware of the baseUrl.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Merge pull request #2228 from opf/fix/gulp-increment-express-port

Amend gulp express task to use next available port