[CXF-5154,CXF-5155] - Some changes to the PEP -> PDP request


Conflicts:
	rt/security/src/main/java/org/apache/cxf/rt/security/xacml/CXFMessageParser.java
	rt/security/src/main/java/org/apache/cxf/rt/security/xacml/DefaultXACMLRequestBuilder.java
	rt/security/src/test/java/org/apache/cxf/rt/security/xacml/XACMLRequestBuilderTest.java

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/2.7.x-fixes@1508092 13f79535-47bb-0310-9956-ffa450edef68