INT-3353 Concurrent RedisMetadataStore

JIRA: https://jira.spring.io/browse/INT-3353

Shared metadata for PersistentAcceptOnceFileListFilters.

INT-3353 Polishing; PR Comments
INT-3358: Make `MutableMessage` package protected

JIRA: https://jira.spring.io/browse/INT-3358
INT-3353 Fix Docbook White Space

JIRA: https://jira.spring.io/browse/INT-3355
INT-3355 Improve Redis Tests, RedisLockReg.list()

JIRA: https://jira.spring.io/browse/INT-3355

Previously, the RedisAvailableTests unconditionally
flushed Redis; this is not appropriate and could affect
other builds on the CI server (as well as wiping out the
developer's Redis DB).

Change the tests to clean up their own redis data.

Also, improve `RedisLockRegistry.listLocks()` to use mget.
INT-3351: Add `@Poller` for Messaging Annotations

JIRA: https://jira.spring.io/browse/INT-3351

INT-3351: Polishing according PR comments

* Add `property-placeholder` support for `@Poller`
* Change `ref` to `value`
* Add JavaDoc for `array` workaround
* Add docs

INT-3351: Polishing and fixes

INT-3351 More Tests

INT-3351: PR comments

INT-3351 Final Polishing
INT-3360 Fix Package Tangle

JIRA: https://jira.spring.io/browse/INT-3360

Move LockRegistry from util to support.
INT-3339: Add `priority` to the `JdbcChannelMS`

JIRA: https://jira.spring.io/browse/INT-3339
INT-3339: Improve `priority` logic