p latency bounded by large latency link

$ simdag/network/p2p/test_latency_bound ${srcdir:=.}/simdag/network/p2p/platform_2p_1bb.xml --surf-path=${srcdir} --log=sd_kernel.thres=warning
> [0.000000] [surf_workstation/INFO] surf_workstation_model_init_ptask_L07
> 10001.5