[BugFix] check the MDAM model for the VRP and OP

[Chuanbo HUA]

The MDAM model's original implementation has different process steps for TSP and, VRP, OP. In our implementation, we have the problem context; the running is no problem. But I have to double-check if the MDAM for TSP and VRP works properly. Mostly it's about the depot information (for the VRP problem the depot information is split with agents' information).

• TSP: done, works the same with the original code;
• CVRP;
• PCTSP;
• OP;

[Chuanbo HUA]

MDAM model is now in lower priority. We temporary close this issue. We can re-open this in the appendix period or future working time.