Nullpointer exception when help subcommand is not recognised
Description
If the user enters 'zanata-cli help oops' it will result in a nullpointer exception.
It should indicate the command is not known and print the usage.
Environment
None
Assignee
Unassigned
Reporter
Damian Jansen
Labels
None
Tested Version/s
None
Components
Fix versions
Affects versions
Priority
unspecifiedConfigure