slapos/request: Force !py! magic workaround
In order to force zc.buildout to remove, if needed, !py! magic string, always access software-type key by using getitem (with []), instead of get, and reimplement default in caller.
In order to force zc.buildout to remove, if needed, !py! magic string, always access software-type key by using getitem (with []), instead of get, and reimplement default in caller.