feat(core): sort users by IDs when synchronizing LDAP

- When synchronizing whole LDAP sort processed users
  by their IDs to get more consistent log output.

perun-ldapc/src/main/java/cz/metacentrum/perun/ldapc/beans/UserSynchronizer.java

@@ -14,14 +14,14 @@
 import cz.metacentrum.perun.ldapc.model.PerunUser;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.beans.BeansException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
 import org.springframework.stereotype.Component;
 
 import javax.naming.Name;
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -115,6 +115,7 @@ public void synchronizeUsers() {
 
 			log.debug("Getting list of users");
 			List<User> users = perun.getUsersManagerBl().getUsers(ldapcManager.getPerunSession());
+			users.sort(Comparator.comparingInt(User::getId));
 			Set<Name> presentUsers = new HashSet<Name>(users.size());
 
 			syncExecutor.setCorePoolSize(5);