SpringSecurityAuditorAware: Reduce logging level when security principal not available

security/src/main/java/org/genesys/blocks/security/SpringSecurityAuditorAware.java

@@ -56,7 +56,7 @@ public class SpringSecurityAuditorAware implements AuditorAware<Long> {
 			}
 		}
 		
-		LOG.warn("No security principal available.");
+		LOG.info("No security principal available.");
 		return null;
 	}