kolla prechecks fail with ansible>=2.3.1.0

[Emma Foley]

TASK [rabbitmq : fail] **********************************************************************************************************************************************************************************************************************
 [WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}. Found: '{{ hostvars[item['item']]['ansible_' + hostvars[item['item']]['api_interface']]['ipv4']['address'] }}' not in '{{ item.stdout
}}'

fatal: [testing-kolla]: FAILED! => {"failed": true, "msg": "The conditional check ''{{ hostvars[item['item']]['ansible_' + hostvars[item['item']]['api_interface']]['ipv4']['address'] }}' not in '{{ item.stdout }}'' failed. The error was: Invalid conditional detected: EOL while scanning string literal (<unknown>, line 1)\n\nThe error appears to have been in '/usr/local/share/kolla-ansible/ansible/roles/rabbitmq/tasks/precheck.yml': line 54, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- fail: msg=\"Hostname has to resolve to IP address of api_interface\"\n ^ here\n"}
        to retry, use: --limit @/usr/local/share/kolla-ansible/ansible/site.retry

PLAY RECAP **********************************************************************************************************************************************************************************************************************************
testing-kolla : ok=38 changed=0 unreachable=0 failed=1

Command failed ansible-playbook -i /usr/local/share/kolla-ansible/ansible/inventory/all-in-one -e @/etc/kolla//globals.yml -e @/etc/kolla/passwords.yml -e CONFIG_DIR=/etc/kolla/ -e action=precheck /usr/local/share/kolla-ansible/ansible/site.yml --verbose

sudo kolla-ansible --verbose --configdir /etc/kolla/ -i /usr/local/share/kolla-ansible/ansible/inventory/all-in-one prechecks

Source of the issue:
[WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}. Found: '{{ hostvars[item['item']]['ansible_' + hostvars[item['item']]['api_interface']]['ipv4']['address'] }}' not in '{{ item.stdout
}}'

Ansible no longer supports using jinja2 templating delimiters in "when" statements
Happens with ansible 2.3.1.0 (released on June 1, 2017)
works with ansible<2.3.1.0

Workaround: 'sudo pip install -U ansible<2.3.1.0'
Fix: Remove jinja templating from when causes?

[Eduardo Gonzalez (egonzalez90)]

Was already fixed in master and backported to ocata.

Marking bug as duplicated of:

https://bugs.launchpad.net/kolla-ansible/+bug/1695111