Arvados

I have a branch of arvbox, I just tried upgrading ruby to 2.4. We might have a problem with the SSO server:

2019-03-13_18:21:07.25233 Bundler::GemRequireError: There was an error while trying to load the gem 'devise'.
2019-03-13_18:21:07.25233 Gem Load Error is: ActiveSupport::Duration can't be coerced into Integer
2019-03-13_18:21:07.25233 Backtrace for gem load error is:
2019-03-13_18:21:07.25233 /var/lib/gems/ruby/2.4.0/gems/activesupport-3.2.22.5/lib/active_support/core_ext/numeric/time.rb:50:in `*'
2019-03-13_18:21:07.25233 /var/lib/gems/ruby/2.4.0/gems/activesupport-3.2.22.5/lib/active_support/core_ext/numeric/time.rb:50:in `days'
2019-03-13_18:21:07.25234 /var/lib/gems/ruby/2.4.0/gems/activesupport-3.2.22.5/lib/active_support/core_ext/numeric/time.rb:55:in `weeks'
2019-03-13_18:21:07.25234 /var/lib/gems/ruby/2.4.0/gems/devise-2.2.8/lib/devise.rb:102:in `<module:Devise>'
2019-03-13_18:21:07.25234 /var/lib/gems/ruby/2.4.0/gems/devise-2.2.8/lib/devise.rb:8:in `<top (required)>'
2019-03-13_18:21:07.25234 /var/lib/gems/gems/bundler-1.16.1/lib/bundler/runtime.rb:81:in `require'
2019-03-13_18:21:07.25234 /var/lib/gems/gems/bundler-1.16.1/lib/bundler/runtime.rb:81:in `block (2 levels) in require'
2019-03-13_18:21:07.25234 /var/lib/gems/gems/bundler-1.16.1/lib/bundler/runtime.rb:76:in `each'
2019-03-13_18:21:07.25235 /var/lib/gems/gems/bundler-1.16.1/lib/bundler/runtime.rb:76:in `block in require'
2019-03-13_18:21:07.25235 /var/lib/gems/gems/bundler-1.16.1/lib/bundler/runtime.rb:65:in `each'
2019-03-13_18:21:07.25235 /var/lib/gems/gems/bundler-1.16.1/lib/bundler/runtime.rb:65:in `require'
2019-03-13_18:21:07.25235 /var/lib/gems/gems/bundler-1.16.1/lib/bundler.rb:114:in `require'
2019-03-13_18:21:07.25236 /usr/src/sso/config/application.rb:7:in `<top (required)>'
2019-03-13_18:21:07.25236 /usr/src/sso/Rakefile:4:in `require'
2019-03-13_18:21:07.25236 /usr/src/sso/Rakefile:4:in `<top (required)>'