Hack support for Rails 5 with Jruby
Hack support for Rails 5 with Jruby

See https://github.com/jruby/activerecord-jdbc-adapter/issues/700 which
is unresolved since December 2015, but closed.  A branch exists and we
can try using that to maintain support.

envato/delayed_job,khwangster/delayed_job,khwangster/delayed_job,collectiveidea/delayed_job