s4:pyrpc: fix talloc hierachy in py_dcerpc_interface_init_helper()
The tevent_context is cached under the connection,
so we need to make sure it stays arround as long as the connection.
Otherwise it will segfault while dereferencing the tevent_context
on deallocation if a secondary connection is arround.
This completes commit
4cc3388c034fa43c855fba802a30bbd2e78122be,
which only fixed it in dcerpc_interface_new().
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>