Introduce a new mode: INDIVIDUAL_ACKNOWLEDGE

[eolivelli]

Many messaging systems, like Apache Pulsar with Shared subscriptions, support acknowledging single messages.
Current Session.CLIENT_ACKNOWLEDGE requires that all the messages dispatched by the session have to be acknowledged and not only that single message.

Some references:

• Apache Pulsar via Starlight for JMS: New Mode INDIVIDUAL_ACKNOWLEDGE datastax/pulsar-jms#30
• Apache ActiveMQ Artemis: https://activemq.apache.org/components/artemis/documentation/latest/pre-acknowledge.html

[OndroMih]

I think it's the same as this old issue: #178 I'll close the old issue and will keep this new one.

[OndroMih]

The old issue #178 suggested MESSAGE_ACKNOWLEDGE as the name of this property. @eolivelli, I see that you suggested to name it INDIVIDUAL_ACKNOWLEDGE, which is already used in Pulsar and ActiveMQ Artemis. Do you know which names for the property are used in other brokers which provide a similar feature?

[eolivelli]

I know that Tibco-EMS has a similar feature and probably the name is the same

[OndroMih]

I found this about Tibco: https://docs.tibco.com/pub/api-exchange-gateway/2.2.0/doc/html/GUID-53F882E5-B5F4-4D7D-8E81-00D837EC22AA.html
It looks like their name for the same mode is EXPLICIT_CLIENT_ACKNOWLEDGE, not the best name IMHO :)

[mattrpav]

Dupe of #95