CORBA3 — What ORBInitInfo operations are legal during pre_init() and post_init()?

There is no information in chapter 21 that specifies which operations on
ORBInitInfo can be legally called during pre_init or post_init.

The intention appears to be that calls to register new interceptors or
allocate a new slot id should be illegal during post_init.

Calling resolve_initial_references during pre_init does not appear to be
wise, but otherwise seems benign.

Proposed resolution:

Add the following to 21.7.1.2:

"During a call to post_init(), invoking the ORBInitInfo methods:
add_client_request_interceptor, add_server_request_interceptor,
allocate_slot_id or add_ior_interceptor will raise the BAD_INV_ORDER
standard system exception with minor code nnn."

duplicate of issue 5691