Azure: Populate containers with self-AAAA records
    
    IPA server's AAAA records at embedded DNS mode depend on result of
    `get_server_ip_address` function(`ipaserver.install.installutils`),
    which in turn, relies on NSS.
    
    In case of Azure Pipelines, there are neither IPv6 records in
    '/etc/hosts' nor external DNS, which may provide such. This leads to
    the missing AAAA records for master and missing AAAA records for `ipa-ca`
    pointing to master in embedded DNS.
    
    In particular, tests `test_ipa_healthcheck_no_errors`,
    `test_ipa_dns_systemrecords_check` fail with:
    ```
    [
      {
        "source": "ipahealthcheck.ipa.idns",
        "check": "IPADNSSystemRecordsCheck",
        "result": "WARNING",
        "uuid": "b979a88a-6373-4990-bc83-ce724e9730b4",
        "when": "20210120055054Z",
        "duration": "0.032740",
        "kw": {
          "msg": "Got {count} ipa-ca AAAA records, expected {expected}",
          "count": 1,
          "expected": 2
        }
      }
    ]
    ```
    where `ipa-ca` record exists only for replica.
    
    Note: since the most of the code in setup_containers was touched it has
    been reformatted.
    
    Fixes: https://pagure.io/freeipa/issue/8683
    Signed-off-by: Stanislav Levin <slev@altlinux.org>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>