[google|compute] Change projects we search for images in.

This removes Google (which has no valid v1 images) and adds rhel-cloud and suse-cloud. It also wraps the lookups in a catch block for not-found exceptions because not everyone has access to everything.

This fixes https://github.com/fog/fog/issues/2743

This mimics the gcutil code, and is sadly the way Google wants us to do this check.

@geemus and @kbockmanrs PTAL