NS2 lab programs missing in Network Programming Lab

[prabodhcp]

The solutions that were made available for the network simulation part in the 7th sem Network Programming lab is missing. I remember @niteshjain had contributed those ns2 simulation scripts. See if they can be restored back

[niteshjain]

@pcputta you can check this https://github.com/niteshjain/VTU/tree/master/CSE/7thSem/networks-lab/simulation. I am not sure if they are valid though.