Tests for JGroups' AUTH and ENCRYPT protocols

The goal was to verify basic configuration in the server distribution. I also checked with Wireshark that data transmission is encrypted when ENCRYPT is used, but this test is not automated. We will automate it in tests for library mode as it's a bit difficult to test in server distro.

Run the test with  mvn clean test -Psuite.others -Dtest=AuthAndEncryptProtocolTest

Martin