remove need_hints parameters to configure_view

remove need_hints parameters to configure_view

The `configure_view()` `need_hints` is removed as it this function was
always called with the value `true`.

The `need_hints` wasn't even used in the function. The only thing it was
actually used was to throw a warning which can be done simply in an
`else` condition branch.

Moreoever, in the case of catalog zones and response-policy, it fixes a
possible bug that would affect root zones, as those wouldn't be reverted
back to their previous version in case of the view fails to load
(during a server reconfiguration).