Bump rails for the record instantiation time backport

https://github.com/ManageIQ/rails/pull/6
https://github.com/ManageIQ/rails/pull/8
https://github.com/ManageIQ/manageiq/pull/821
Merge pull request #836 from jrafanie/bump_rails_for_record_instantiation_time_backport

Bump rails for the record instantiation time backport