rabbitmq cert and keys are injected incorretly after certmonger regenerates them

When certmonger resubmit a certificate to the IPA server, it calls a post_save script that fails to inject the updated certificate and key because it fetches an invalid hiera key:

[root@messaging-1 ~]# /usr/bin/certmonger-rabbitmq-refresh.sh
Traceback (most recent call last):
        9: from /bin/hiera:246:in `<main>'
        8: from /usr/share/ruby/vendor_ruby/hiera.rb:116:in `lookup'
        7: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:267:in `lookup'
        6: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:267:in `each'
        5: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:272:in `block in lookup'
        4: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:272:in `catch'
        3: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:279:in `block (2 levels) in lookup'
        2: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:316:in `qualified_lookup'
        1: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:316:in `each'
/usr/share/ruby/vendor_ruby/hiera/backend.rb:329:in `block in qualified_lookup': Hiera type mismatch: Got String when a hash-like object was expected to access value using 'service_certificate' from key 'tripleo::rabbitmq::service_certificate.service_certificate' (Exception)
Traceback (most recent call last):
        9: from /bin/hiera:246:in `<main>'
        8: from /usr/share/ruby/vendor_ruby/hiera.rb:116:in `lookup'
        7: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:267:in `lookup'
        6: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:267:in `each'
        5: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:272:in `block in lookup'
        4: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:272:in `catch'
        3: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:279:in `block (2 levels) in lookup'
        2: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:316:in `qualified_lookup'
        1: from /usr/share/ruby/vendor_ruby/hiera/backend.rb:316:in `each'
/usr/share/ruby/vendor_ruby/hiera/backend.rb:329:in `block in qualified_lookup': Hiera type mismatch: Got String when a hash-like object was expected to access value using 'service_key' from key 'tripleo::rabbitmq::service_certificate.service_key' (Exception)
tar: Substituting `.' for empty member name
tar: : Cannot stat: No such file or directory
tar: Substituting `.' for empty member name
tar: : Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors
cp: -r not specified; omitting directory '/var/lib/kolla/config_files/src-tls'
chown: cannot access '': No such file or directory
chown: cannot access '': No such file or directory