oneflow CLI buggy autocompletion

[dann1]

Description

Bash autocompletion generates error output when pressing tab in order to autocomplete parameters.

To Reproduce

• Write any oneflow, like oneflow, command (tab works here to autocomplete command name)
• Write a subcommand, like delete (tab works here to autocomplete subcommand name)
• Press Tab

root@opennebula-frontend:~# oneflow delete invalid option: --no-header
/invalid option: --no-header

Expected behavior
Autocomplete with instance information, or at least do not autocomplete with error messages.

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)