updates job failing with ["/bin/sh: dnf: command not found"]

[Jose Luis Franco]

The tripleo-ci-centos-7-scenario000-multinode-oooq-container-updates job is failing with the following error during the 'overcloud update run' step:

2018-09-05 13:14:08 | u'TASK [container-registry : can docker be updated] ******************************',
2018-09-05 13:14:08 | u'Wednesday 05 September 2018 13:14:05 +0000 (0:00:00.152) 0:01:12.213 *** ',
2018-09-05 13:14:08 | u' [WARNING]: Consider using the dnf module rather than running dnf. If you need',
2018-09-05 13:14:08 | u'to use command because dnf is insufficient you can add warn=False to this',
2018-09-05 13:14:08 | u'command task or set command_warnings=False in ansible.cfg to get rid of this',
2018-09-05 13:14:08 | u'message.',
2018-09-05 13:14:08 | u'fatal: [centos-7-rax-iad-0001778319]: FAILED! => {"changed": false, "cmd": "dnf check-update docker", "delta": "0:00:00.005863", "end": "2018-09-05 13:14:05.676437", "failed_when_result": true, "msg": "non-zero return code", "rc": 127, "start": "2018-09-05 13:14:05.670574", "stderr": "/bin/sh: dnf: command not found", "stderr_lines": ["/bin/sh: dnf: command not found"], "stdout": "", "stdout_lines": []}',

overcloud_update_run_Controller.log log: http://logs.openstack.org/05/599605/7/check/tripleo-ci-centos-7-scenario000-multinode-oooq-container-updates/b268aa6/logs/undercloud/home/zuul/overcloud_update_run_Controller.log.txt.gz#_2018-09-05_13_14_08

JOB LOGS: http://logs.openstack.org/05/599605/7/check/tripleo-ci-centos-7-scenario000-multinode-oooq-container-updates/b268aa6/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/600437

[OpenStack Infra (hudson-openstack)]

Change abandoned by Jose Luis Franco (<email address hidden>) on branch: master
Review: https://review.openstack.org/600437
Reason: Covered in https://review.openstack.org/#/c/600334/2