OTS — Activity service issue: Add CompletionStatus to complete_activity

In a distributed system consisting of:
client---------->server1

a client may perform:

CosActivity::Current_ptr cur;
cur->set_completion_status(CompletionStatusFail);
cur->set_completion_signal_set("CSS");
do some work - all is well
cur->complete_with_status(CompletionStatusSuccess);

The Activity service implementation of Current::complete_with_status needs
to propagate both CompletionSignalSet name and CompletionStatus to the
ActivityCoordinator. The means by which the Current object calls the
ActivityCoordinator is via the latter;s complete_activity method.
The signature for complete_activity allows the SignalSet name to be passed
but not the CompletionStatus.
I think at some point we had a set_completion_status method on the
ActivityCoordinator but it is no longer there.
There is currently no way for this information to be passed to the
ActivityCoordinator.

I believe the complete_activity method should take the CompletionStatus as
an additional parameter.

Modify the IDL and accompanying text