[WFLY-3403] Upgrade to PicketBox 4.0.21.Beta3
[BZ1066470] Modifying testcases to check referral user LDAP authentication.
Merge pull request #6309 from pskopek/WFLY-3403-comp-upg

[WFLY-3403] Upgrade to PicketBox 4.0.21.Beta3