Kie Server is not started in APB becuase prometheus check failed

fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'apb_kieserver_prometheus_ext_disabled' is undefined\n\nThe error appears to have been in '/opt/ansible/roles/deploy-kieserver/tasks/main.yml': line 102, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n - name: \"[KIE SERVER {{ kieserver_deployment_index }}] set kieserver state to {{ state }}\"\n ^ here\nWe could be wrong, but this one looks like it might be an issue with\nmissing quotes. Always quote template expression brackets when they\nstart a value. For instance:\n\n with_items:\n - {{ foo }}\n\nShould be written as:\n\n with_items:\n - \"{{ foo }}\"\n"}