INT-3846: SimpleMessageStore Improvements

JIRAs:
https://jira.spring.io/browse/INT-3830
https://jira.spring.io/browse/INT-3523
https://jira.spring.io/browse/INT-3846

* Fix the OOM condition, when we `release()` `UpperBound` independently of the previous `remove` result (https://jira.spring.io/browse/INT-3846)
* Fix "confuse" around `groupCapacity`, when we really didn't care about individual groups (https://jira.spring.io/browse/INT-3523)
* Add `upperBoundTimeout` to have a hook to wait some time for the empty slot in the store (https://jira.spring.io/browse/INT-3830)
* Fix some JavaDocs warnings
* Fix some typos

* Fix inconsistency in the `DelayHandler` around `removeMessageFromGroup` when `MS` is `SimpleMessageStore`
 * Remove `UpperBound.release()` operation from `SimpleMessageStore.removeGroup()`.
 The waiting process should worry about the new `UpperBound` instance.

Some other polishing

`tryAcquire` outside of the `lock`

Move `tryAcquire` within the `addMessageToGroup` outside of `lock`.
But do that only for groups which already exist.
For the new groups we have a fresh `UpperBound`, so no need to worry about dead lock and
 we can obtain  a permit immediately.

SimpleMessageGroup: BlockingQueue -> LinkedHashSet

`SimpleMessageStore`: use "unsynchonized" `SimpleMessageGroup`

Make some synchronization fixes according to the migration to the `LinkedHashSet`

Avoid extra `Collection`

`ResequencingMessageHandler`: compare `size()` of collections instead of `containsAll()`

Fix `ConcurrentModificationException` in the `AbstractKeyValueMessageStore`

Add `SimpleMessageStore.clearMessageGroup()`

Accept polishing and fix `RedisChannelMessageStoreTests`

`@Deprecated` `MessageGroupStore.removeMessageFromGroup()`

Fix some typos

Introduce `SimpleMessageGroupFactory`

Extract `MessageGroupFactory` and address PR comments

Polishing after rebase

JavaDocs and Reference Manual

Fix JavaDocs

spring-integration-file/src/main/java/org/springframework/integration/file/FileWritingMessageHandler.java

@@ -307,7 +307,7 @@ public class FileWritingMessageHandler extends AbstractReplyProducingMessageHand
 				if (!resultFile.exists() &&
 						generatedFileName.replaceAll("/", Matcher.quoteReplacement(File.separator))
 								.contains(File.separator)) {
-					resultFile.getParentFile().mkdirs();
+					resultFile.getParentFile().mkdirs(); //NOSONAR - will fail on the writing below
 				}
 				if (payload instanceof File) {
 					resultFile = handleFileMessage((File) payload, tempFile, resultFile);