Fixing a bug with Metadata Signature Creation + adding system tests for the RP

Conflicts:
	systests/cxf/src/test/resources/fediz_config.xml
	systests/jetty8/src/test/resources/fediz_config.xml
	systests/tests/src/test/java/org/apache/cxf/fediz/integrationtests/AbstractTests.java
	systests/tomcat7/src/test/resources/fediz_config.xml