cic track start options/usage

[jimconner]

cic track start ansible without specifying a --fork parameter gives the error message Fork option container invalid characters. Check you have typed it correctly.

That error message contains a typo 'container' instead of 'contains' which needs fixing, but we should also output a 'usage' line in standard bash manpage format to show how it should be done.

i.e. cic track start <trackname> --fork <fork>

If fork is a required argument for cic track start <track> then it would be good to miss out the --fork option flag.

i.e. cic track start <trackname> <fork>