ISPN-4942 Revert parent back to infinispan-bom

* Remove Import-Package for infinispan package brought in ISPN-5048
ISPN-5029 Make FileLookup backwards compatible with 6.x
ISPN-5017 Include the CLI uberjar in the distribution zip
ISPN-5069 Upgrade to protostream-2.0.3.Final
ISPN-5010 Configure event sender as an async Listener

* Ordering is only guaranteed as long as the async listener executor
is configured with 1 thread, which is the default.
* By using async listener, construction of the event and sending it
is taken out of the critical path of the Hot Rod client request.
ISPN-5010 Batch events in queue and flush with time and size triggers