order of the arguments fixed

Closes #150 (closed)

web/src/main/java/lcsb/mapviewer/bean/UserBean.java

@@ -584,7 +584,7 @@ public class UserBean extends AbstractManagedBean {
 			authenticationToken = getUserService().login(Configuration.ANONYMOUS_LOGIN, "");
 		}
 		Calendar now = Calendar.getInstance();
-		now.add(-1, Calendar.MINUTE);
+		now.add(Calendar.MINUTE, -1);
 		if (authenticationToken.getExpires().after(now)) {
 			authenticationToken = getUserService().login(Configuration.ANONYMOUS_LOGIN, "");
 		}