sort deadlines

src/main/java/ru/ulstu/paper/model/Paper.java

@@ -19,6 +19,7 @@ import javax.persistence.JoinColumn;
 import javax.persistence.ManyToMany;
 import javax.persistence.ManyToOne;
 import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
 import javax.persistence.Temporal;
 import javax.persistence.TemporalType;
 import java.util.ArrayList;
@@ -69,6 +70,7 @@ public class Paper extends BaseEntity implements UserContainer {
     @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
     @JoinColumn(name = "paper_id", unique = true)
     @Fetch(FetchMode.SUBSELECT)
+    @OrderBy("date")
     private List<Deadline> deadlines = new ArrayList<>();
 
     private String comment;