GUACAMOLE-2181: Rely on automatic stack traces for debug-level logs.

extensions/guacamole-auth-sso/modules/guacamole-auth-sso-saml/src/main/java/org/apache/guacamole/auth/saml/acs/AssertionConsumerServiceResource.java

@@ -125,8 +125,7 @@ public class AssertionConsumerServiceResource extends SSOResource {
 
         // If invalid, redirect back to main page to re-attempt authentication
         catch (GuacamoleException e) {
-            logger.warn("Authentication attempted with an invalid SAML response: {}", e.getMessage());
-            logger.debug("Received SAML response failed validation.", e);
+            logger.warn("Authentication attempted with an invalid SAML response: {}", e.getMessage(), e);
             return Response.seeOther(guacBase).build();
         }