[SWS-635] - set the root exception when authentication fails.

security/src/main/java/org/springframework/ws/soap/security/wss4j/callback/SpringPlainTextPasswordValidationCallbackHandler.java

@@ -86,7 +86,7 @@ public class SpringPlainTextPasswordValidationCallbackHandler extends AbstractWs
             }
             SecurityContextHolder.clearContext();
             if (!ignoreFailure) {
-                throw new WSSecurityException(WSSecurityException.FAILED_AUTHENTICATION);
+                throw new WSSecurityException(WSSecurityException.FAILED_AUTHENTICATION, null, null, failed);
             }
         }
     }