INT-3167: Polishing Twitter Documentation

JIRA: https://jira.springsource.org/browse/INT-3167

Doc Polishing
INT-3177: Generic RedisTemplate for PublishingMH

JIRA: https://jira.springsource.org/browse/INT-3177

* Change `RedisPublishingMessageHandler.StringRedisTemplate` to `RedisTemplate<?, ?>`
* Don't provide `serializer` to the `template`
* Use `serializer` directly for values which are not `byte[]`
* Add `RedisAvailableTests#awaitContainerSubscribed` for tests to avoid race conditions
* Refactor some tests
* Add test for `byte[]` payload

INT-3177: Generic RedisInboundChannelAdapter

Port from Spring XD: allow for `RedisInboundChannelAdapter`
to receive from Redis any object, not only String

* Make `serializer` property 'resettable' to `null`
* Change `RedisInboundChannelAdapterParser` to allow to apply
empty value from `serializer` attribute
* Add parser test and test for `byte[]` messages

INT-3177: Polishing and documentation

JIRA: https://jira.springsource.org/browse/INT-3033

* Add `topic-expression` to `<int-redis:outbound-channel-adapter>`
* Add tests and docs

INT-3177: Deprecate `RedisPublishMH.defaultTopic`

* Make `topic` and `topic-expression` attributes as mutually exclusive
* Polishing Redis Topic Parsers
* Polishing tests and docs
* Default `serializer` for Redis Topic Adapters is `StringRedisSerializer` for backward compatibility

Polishing according PR's discussion

INT-3177 Doc Polishing
INT-3196: RedisQueueMDE: Add RecoveryInterval

Catch `RedisSystemException` in the `ListenerTask` and sleep current Thread
 with `recoveryInterval` if the Endpoint is `active` before the next `restart()`

JIRA: https://jira.springsource.org/browse/INT-3196

RedisConnFailure & RedisSys Exceptions recovery

Introduce `RedisIntegrationEvent`s

* Catch all `Exception`s on `this.boundListOperations.rightPop`
* Log them and send within `RedisExceptionEvent`
* Mark some fields with `volatile`
INT-3017 Redis TaskExecutor Changes

Don't wrap the TE in an EHTE if there is no BeanFactory.
INT-3198: Add 'recovery-interval' for redis-q-c-a

JIRA: https://jira.springsource.org/browse/INT-3198

* Expose `RedisQueueMessageDrivenEndpoint.recoveryInterval` to Namespace support
* Add parser's tests
* Rename parser test class
* Polishing for concurrency of`RedisQueueMessageDrivenEndpointTests#testInt3196Recovery` test
* Add documentation for 'recovery-interval' and Redis Events implementation

Doc Polishing

Add more delay because of unsolvable race condition in the Redis Subscription - see DATAREDIS-242
INT-2946: Add redis:i-c-a `topic-patterns` Attr.

JIRA: https://jira.springsource.org/browse/INT-2946

Polishing
INT-3100 Support Remote File Streaming (Inbound)

- Add readRaw and finalizeRaw methods to Session
- Add tests for SFTP and FTP

Allows retrieval of a remote file as a stream.

JIRA: https://jira.springsource.org/browse/INT-3100