Student Scheduling: Enrollment

- equals: include reservation in the equality checking
- this fixes an issue with solution restore (current solution containing the same enrollment, but without the reservation)

src/org/cpsolver/studentsct/model/Enrollment.java

@@ -510,6 +510,8 @@ public boolean equals(Object o) {
             return false;
         if (!ToolBox.equals(getAssignments(), e.getAssignments()))
             return false;
+        if (!ToolBox.equals(getReservation(), e.getReservation()))
+            return false;
         return true;
     }