console: fix namespace problems when using slapos console with scripts
When using slapos console on scripts defining functions, for example
def my_request(*args, **kw):
...
return request(*args, **kw)the global names such as request where no longer available in the
namespace of the function, because of a wrong usage of exec regarding
locals/globals.
Co-authored-by: Kirill Smelkov kirr@nexedi.com