DNS forwarder value needs to be stripped of trailing spaces in rawhide

[flo-renaud]

When running the PRCI tests on rawhide, the dns_forwarder is extracted using resolvectl status command (https://github.com/freeipa/freeipa-pr-ci/blob/master/ansible/roles/machine/provision/tasks/main.yml#L18) but this results in a variable containing trailing spaces.

See for instance the PR #586 where the test_webui_users test fails. The generated ipa-test-config.yaml contains trailing spaces for the dns_forwarder value and this results in ipa-server-install failure visible in runner.log.gz:

2020-12-12 15:52:23,733    DEBUG  TASK [machine/provision_ipaserver : install freeipa] ***************************
2020-12-12 15:52:26,840    DEBUG  fatal: [master]: FAILED! => {
2020-12-12 15:52:26,840    DEBUG      "changed": true,
2020-12-12 15:52:26,841    DEBUG      "cmd": "ipa-server-install -U -n ipa.test -r IPA.TEST -p Secret.123 -a Secret.123 --setup-dns --setup-kra --forwarder='192.168.122.1            '\n",
2020-12-12 15:52:26,841    DEBUG      "delta": "0:00:02.142841",
2020-12-12 15:52:26,841    DEBUG      "end": "2020-12-12 15:52:26.301897",
2020-12-12 15:52:26,841    DEBUG      "rc": 2,
2020-12-12 15:52:26,842    DEBUG      "start": "2020-12-12 15:52:24.159056"
2020-12-12 15:52:26,842    DEBUG  }
2020-12-12 15:52:26,842    DEBUG  
2020-12-12 15:52:26,842    DEBUG  STDERR:
2020-12-12 15:52:26,842    DEBUG  
2020-12-12 15:52:26,843    DEBUG  Usage: ipa-server-install [options]
2020-12-12 15:52:26,843    DEBUG  
2020-12-12 15:52:26,843    DEBUG  ipa-server-install: error: option --forwarder: invalid IP address 192.168.122.1            : failed to detect a valid IP address from '192.168.122.1            '
2020-12-12 15:52:26,843    DEBUG  
2020-12-12 15:52:26,843    DEBUG  
2020-12-12 15:52:26,843    DEBUG  MSG:
2020-12-12 15:52:26,844    DEBUG  
2020-12-12 15:52:26,844    DEBUG  non-zero return code

The playbook should be fixed to strip the trailing spaces.

[netoarmando]

Also, I saw that ipa-test-config.yaml is listing 2 addresses, one is the "global" DNS server and the other is for eth0.