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

Status

Assignee

Unassigned

Reporter

Damian Jansen

Labels

None

Tested Version/s

None

Components

Fix versions

Affects versions

Priority

unspecified
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