Description of problem:
Unable to configure aaa-ldap if IPv6 is enable. 

logs show:
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WARNING: [ovirt-engine-extension-aaa-ldap.authn::XXXXXX.fr-authn] Cannot initialize LDAP framework, deferring initialization. Error: An error occurred while attempting to connect to server ldap2.XXXXXX.fr:636:  IOException(LDAPException(resultCode=91 (connect error), errorMessage='An error occurred while attempting to establish a connection to server ldap2.XXXXX.fr/91.XXX.XXX.XXX:636:  UnknownHostException(ldap2.XXXXXX.fr), ldapSDKVersion=4.0.14, revision=c0fb784eebf9d36a67c736d0428fb3577f2e25bb'))
          Oct 12, 2020 1:34:38 PM org.ovirt.engine.exttool.core.ExtensionsToolExecutor main
          SEVERE: An error occurred while attempting to connect to server ldap2.XXXXXX.fr:636:  IOException(LDAPException(resultCode=91 (connect error), errorMessage='An error occurred while attempting to establish a connection to server ldap2.XXXXXX.fr/91.XXX.XXX.XXX:636:  UnknownHostException(ldap2.XXXXXX.fr), ldapSDKVersion=4.0.14, revision=c0fb784eebf9d36a67c736d0428fb3577f2e25bb'))
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ldap properties have
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include = <rfc2307-openldap.properties>

vars.server = ldap2.XXXXXXX.fr

pool.authz.auth.type = none
pool.default.serverset.type = single
pool.default.serverset.single.server = ${global:vars.server}
pool.default.serverset.single.port = 636
pool.default.ssl.enable = true
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Version-Release number of selected component (if applicable):
1.4.1-1.el8

How reproducible:
OS fresh install:
- CentOS Linux 8 (Core)

Ovirt-engine (fresh install):
- ovirt-engine.noarch 4.4.2.6-1.el8 


Steps to Reproduce:
1. ovirt-engine-extension-aaa-ldap-setup
2. standard configuration (ldaps in my case)

Everything works as expected until the first test at the end of the setup. It's 100% reproductible. 

If I save the config and change the profile-ldap.properties by adding:
- pool.default.socketfactory.resolver.supportIPv6 = false

Everything works as expected.

Actual results:
Unable to login using LDAP athentification

Expected results:
Login with LDAP authentification

Additional info:
I linked another ticket with the same issue and same solution. However our server doesn't resolve an IPv6 at all.