Conflicting argument with --exec

[davidferlay]

Observed

• Using --exec global option on action with no argument fails with ERROR accepts 0 arg(s), received 1

➜ plx platform:nodes --exec sh 
Usage:
  plasmactl platform:nodes [flags]

Arguments:

(...)

  ERROR   accepts 0 arg(s), received 1

• Using --exec global option on action with mandatory argument fails with ERROR validation errors: [arguments]: missing property 'path'

➜ plx platform:vault --keyring-passphrase-file /tmp/kp --exec  -- sh                           
Usage:
  plasmactl platform:vault action path [flags]

Arguments:
      action string   Vault action name: View/edit actions to be set an ansible vault file
      path string     Path to file: The path to the vault file

(...)

  ERROR   validation errors:
            - [arguments]: missing property 'path'

Expected

• Using --exec global option to override image execution should be successful