fix "__getattr__" missing an underscore (#1957)
fix "__getattr__" missing an underscore (#1957)

When invoking "insights-inspect" command without colorama
installed, we fake having the module by returning an empty
string using "__getattr__". However the magic method was
missing one of the leading underscores and thus not
having any effect.

Fixes https://github.com/RedHatInsights/insights-core/issues/1956
RedHatInsights/insights-core,RedHatInsights/insights-core