[Java] Fix issue where multiple archive clients are trying to connect.

[JPWatson]

When spawning clients simultaneously the following exception is thrown in some of the clients:

io.aeron.exceptions.TimeoutException: awaiting response - correlationId=24
	at io.aeron.archive.client.AeronArchive.checkDeadline(AeronArchive.java:1008)
	at io.aeron.archive.client.AeronArchive.pollNextResponse(AeronArchive.java:1122)
	at io.aeron.archive.client.AeronArchive.awaitSessionOpened(AeronArchive.java:1021)
	at io.aeron.archive.client.AeronArchive.<init>(AeronArchive.java:109)
	at io.aeron.archive.client.AeronArchive.connect(AeronArchive.java:183)
	at io.aeron.archive.ArchiveTest.lambda$shouldAllowMultipleConnectionsInParallel$0(ArchiveTest.java:56)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

The ControlResponsePoller expects that calling BREAK will stop the polling operation but when there are multiple Images, subsequent Images will be polled and messages are lost.
Reducing the fragmentLimit is the simplest way I can see to fix this for the time being.
It might be worth adjusting the contract for Subscription.controlledPoll so that anything other than a CONTINUE would stop the current polling operation.