[WFLY-4121] fix LDAP address in AdvancedLdap Login module test

An update in `NetworkUtils.formatPossibleIpv6Address(address)` method canonizes IPv6 addresses now. The `AdvancedLdapLoginModuleTestCase` has to be updated to use correct format for LDAP server SPN in KDC.

JIRA: https://issues.jboss.org/browse/WFLY-4121