Add tests for CLI create command

[pileks]

PR #902 fixed a bug where the refactor to Commander introduced issues with the name argument in the create command.

We should add unit/integration tests to confirm that the CLI commands work as expected in terms of accepting appropriate arguments and produce expected outputs based on the same arguments.

[cbrzn]

This task should be converted into unit tests for the entire CLI and not only the create command. I will push this once the alpha sprint is over :-).

More context of my thoughts on this here #959 (review)

[dOrgJelli]

Closing this as we now fully test the create command, but as @cbrzn has suggested we should create more unit tests for the CLI in general to increase our code coverage.