Add a CLI argument to show/hide meta logs in call command

[tafel]

Sometimes, action's meta object can carry sensible data (like application JWT with long-term validty).

The logging system in call command prints always params and meta information.

This PR adds an argument to call command so it's possible to activate logging without printing meta object.

Simple usage :

moleculer call --level info --logmeta false "service.action" --@param some-value --#token some-hidden-token

To avoid breaking changes, the default value is true so current behaviour stays the same.