OTS — PropertyGroup propagation strategy on intermediate servers with no Property

PropertyGroup propagation
strategy on intermediate servers with no PropertyGroupManger.

The following section is taken from the Activity srevice specification
orbos/2000-06-19.
P58 "A PropertyGroupManager must be registered with each client and server
that wishes to use the type of PropertyGroup it represents."

Consider a configuration where objectA on serverA creates an Activity and
sets PropertyGroup data for PropertyGroup1 and then calls objectB on
serverB which calls objectC on serverC. The Activity service is configured
on all 3 servers. ObjectB and objectC can both access the PropertyGroup
data so long as a PropertyGroupManager for PropertyGroup1 is registered
with the Activity services on serverB and serverC. This is necessary
because a PropertyGroupManager is required to unmarshal the PropertyGroup
context received with the request arriving at each server.
What the specification does not define is whether or not all received
PropertyGroup contexts at serverB are propagated on downstream to serverC
if, for example, the PropertyGroupManager for PropertyGroup1 is not
registered with the Activity service on serverB. If the PropertyGroup1
context is never to be used on serverB then it would simplify deployment if
it were not necessary to configure a PropertyGroup1 PropertyGroupManager on
that server just to ensure that the PropertyGroupIdentity part of the
received context PGContext is propagated on downstream. It would also
improve performance as the PropertyGroup context would not need to be
unmarshalled, so long as the Activity service copied the marshalled
PGContext from the inbound request to the outbound downstream request.
This issue proposes that, in the case where an intermediate server has the
Activity service configured but not a particular PropertyGroupManager, all
PropertyGroupIdentities received with an inbound ActivityContext are
propagated on downstream in any outbound ActivityContexts.

It was agreed that this should be allowed, and text modifications proposed