Featureset039 job failing with python3 not found

[Arx Cruz]

https://logs.rdoproject.org/openstack-periodic-master/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-ovb-3ctlr_1comp_1supp-featureset039-master/b1f60cc/job-output.txt.gz#_2019-06-28_13_26_10_767151

2019-06-28 13:26:08.812740 | primary | ok: [undercloud]
2019-06-28 13:26:08.861934 | primary |
2019-06-28 13:26:08.862042 | primary | TASK [tripleo-inventory : Get IP of extra node in OVB stack] *******************
2019-06-28 13:26:08.873467 | primary | Friday 28 June 2019 13:26:08 +0000 (0:00:00.158) 0:00:01.234 ***********
2019-06-28 13:26:10.766765 | primary | fatal: [undercloud]: FAILED! => {
2019-06-28 13:26:10.767048 | primary | "changed": true,
2019-06-28 13:26:10.767071 | primary | "rc": 127
2019-06-28 13:26:10.767082 | primary | }
2019-06-28 13:26:10.767091 | primary |
2019-06-28 13:26:10.767104 | primary | STDOUT:
2019-06-28 13:26:10.767121 | primary |
2019-06-28 13:26:10.767151 | primary | /bin/sh: python3: command not found
2019-06-28 13:26:10.767160 | primary |
2019-06-28 13:26:10.767169 | primary |
2019-06-28 13:26:10.767177 | primary |
2019-06-28 13:26:10.767190 | primary | STDERR:
2019-06-28 13:26:10.767199 | primary |
2019-06-28 13:26:10.767248 | primary | Warning: Permanently added '127.0.0.2' (ECDSA) to the list of known hosts.
2019-06-28 13:26:10.767274 | primary | Connection to 127.0.0.2 closed.
2019-06-28 13:26:10.767283 | primary |
2019-06-28 13:26:10.767292 | primary |
2019-06-28 13:26:10.767301 | primary |
2019-06-28 13:26:10.767312 | primary | MSG:
2019-06-28 13:26:10.767320 | primary |
2019-06-28 13:26:10.767340 | primary | non-zero return code

[Arx Cruz (arxcruz)]

This also affect stein and rocky releases

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/668402

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/668402
Committed: https://git.openstack.org/cgit/openstack/tripleo-quickstart/commit/?id=9df739dd2a569a92545072c86cf9c4a8efdce796
Submitter: Zuul
Branch: master

commit 9df739dd2a569a92545072c86cf9c4a8efdce796
Author: Arx Cruz <email address hidden>
Date: Mon Jul 1 11:48:31 2019 +0200

    Fix failure in featureset039

    With the upgrade to ansible 2.7 this role started to fail on
    featureset039 due the miss of python3.
    This patch fix it removing the args from shell module and updating the
    python script to use /usr/bin/env.

    Change-Id: I5b827d8e2011fb39e1df7786f012e5551cc4e0d9
    Closes-Bug: #1834655