move dbobjects utils to helpers

service/src/main/java/objects/DBObjectUtils.java → service/src/main/java/helpers/DBObjectUtils.java

-package objects;
+package helpers;
 
 import helpers.PublicProperty;
 import objects.tasks.Task;

service/src/main/java/repositories/TasksRepository.java

@@ -4,7 +4,7 @@ import core.ApplicationConfiguration;
 import core.TaskType;
 import helpers.TextTaskConfig;
 import helpers.WebTaskConfig;
-import objects.DBObjectUtils;
+import helpers.DBObjectUtils;
 import objects.Flag;
 import objects.Solution;
 import objects.Team;