[CXF-5748] - Improve WS-Security Kerberos configuration

Conflicts:
	systests/ws-security/src/test/resources/org/apache/cxf/systest/ws/kerberos/DoubleItKerberos.wsdl
	systests/ws-security/src/test/resources/org/apache/cxf/systest/ws/kerberos/client.xml
	systests/ws-security/src/test/resources/org/apache/cxf/systest/ws/kerberos/server.xml
	systests/ws-security/src/test/resources/org/apache/cxf/systest/ws/kerberos/stax-server.xml
Recording .gitmergeinfo Changes
Fixing build