RAMPART-426: Use Axiom's getRole API to extract the actor/role from the security header.

modules/rampart-core/src/main/java/org/apache/rampart/RampartEngine.java

diff --git a/modules/rampart-core/src/main/java/org/apache/rampart/RampartEngine.java b/modules/rampart-core/src/main/java/org/apache/rampart/RampartEngine.java
index 989e78a..a4d612b 100644
--- a/modules/rampart-core/src/main/java/org/apache/rampart/RampartEngine.java
+++ b/modules/rampart-core/src/main/java/org/apache/rampart/RampartEngine.java
@@ -234,8 +234,7 @@
 		    }
 		}
 		
-		String actorValue = secHeader.getAttributeValue(new QName(rmd
-				.getSoapConstants().getEnvelopeURI(), "actor"));
+		String actorValue = secHeader.getRole();
 
 		Crypto signatureCrypto = RampartUtil.getSignatureCrypto(rpd.getRampartConfig(), 
         		msgCtx.getAxisService().getClassLoader());