Added delete method into LecturerService

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

buisnesslogic/src/main/java/com/plannaplan/services/LecturerService.java

@@ -19,6 +19,10 @@ public class LecturerService {
         repo.save(lecturer);
     }
 
+    public void delete(Lecturer lecturer) {
+        repo.delete(lecturer);
+    }
+
     public int getLecturersAmmount(){
         return (int)this.repo.count();
     }