[WSS-476] - Add the ability to configure the Signature Canonicalization Algorithm via WSHandler


Conflicts:
	src/main/java/org/apache/ws/security/action/SignatureAction.java
	src/main/java/org/apache/ws/security/handler/RequestData.java
	ws-security-dom/src/main/java/org/apache/wss4j/dom/handler/WSHandlerConstants.java
	ws-security-stax/src/main/java/org/apache/wss4j/stax/ConfigurationConverter.java

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/branches/1_6_x-fixes@1513780 13f79535-47bb-0310-9956-ffa450edef68