VPP trace replat utility

This utility allows you to replay API traces generated by VPP, while doing some pre-processing (e.g. creating network namespaces before tap creation)

To use, issue in VPP:

vppctl# api trace save trace.cap

Then run the utility on the output

# for json output use
go run -file ./path/to/trace.cap
# to replay in VPP use
go run -file ./path/to/trace.cap -vpp /run/vpp/vpp.api.sock