Add converted arg_parsing test.
Add converted arg_parsing test.


Former-commit-id: 306b11d1d2181172ed36a2d2a3d424af3da36380
TrimBiggs/libnetwork-plugin,djosborne/libcalico,L-MA/libcalico,projectcalico/libnetwork-plugin,robbrockbank/libcalico,TrimBiggs/libcalico,TrimBiggs/libnetwork-plugin,projectcalico/libcalico,caseydavenport/libcalico,tomdee/libcalico,plwhite/libcalico,insequent/libcalico,alexhersh/libcalico,Symmetric/libcalico,tomdee/libnetwork-plugin