do_not_reuse_logger

A started app (see start_app) cannot reuse the existing logger set up by the primer (or possibly re-configure it).

TODO: Shell we disable configuring loggers for EntryFunc.func_start_app? It cannot reuse loggers because the main function is executed immediately after the process switches (via os.execv) (without a bootstrap). And it cannot configure it identically because the env vars are removed before passing control to the main function.