Update slf4j version

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/wss4j2.0-port@1454428 13f79535-47bb-0310-9956-ffa450edef68
Put slf4j-jdk14 in front of classpath so it's picked up instead of the log4j version that wss4j may pull in

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/wss4j2.0-port@1454429 13f79535-47bb-0310-9956-ffa450edef68
Minor tweaks to try and get some policies in the systests to load

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/wss4j2.0-port@1454430 13f79535-47bb-0310-9956-ffa450edef68