Yes, capablanca is too old.
The instructions that you mention should still work, but remember to
make a backup before doing that in your production environment.
Anyhow, I'd suggest that you install a fresh euwe, if that is an option
for you.
There is no support for YUM/RPM upgrades, as far as I know.
allowed_in_path': The git source https://github.com/ManageIQ/manageiq-providers-amazon is not yet checked out. Please run
bundle install` before trying to start your application (Bundler::GitError)