Added some tests + some fixes for configuring the STSClient via the WSDL of the WSP


Conflicts:
	rt/ws/security/src/main/java/org/apache/cxf/ws/security/trust/AbstractSTSClient.java
	rt/ws/security/src/main/java/org/apache/cxf/ws/security/trust/STSUtils.java

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/2.7.x-fixes@1539646 13f79535-47bb-0310-9956-ffa450edef68