JIRA: https://jira.spring.io/browse/INT-4261
When we have some `Advice` withing TX Advice which may perform `doPoll()`
several times, we unconditionally call
`transactionSynchronizationFactory.create(resource)`.
With the out-of-the-box implementations
`DefaultTransactionSynchronizationFactory` and
`PassThroughTransactionSynchronizationFactory`
we preform `TransactionSynchronizationManager.bindResource()`.
If resource is already there, an `IllegalStateException` is thrown
* Check that resource isn't bound already to the TX and don't create a new
`TransactionalResourceSynchronization` - just return `null`
* Check in the target users for the `null` before registering synchronization
Move resource registration to TX outside of out-of-the-box factories
* Fix condition in the `AbstractPollingEndpoint` for the resource
* Increase responsiveness of TX test to decreasing `fixed-delay`
and using `receive-timeout="-1"`
b869666021