JIRA: https://jira.spring.io/browse/INT-4345
Resolves https://github.com/spring-projects/spring-integration/issues/2238
The `DefaultHandshakeHandler` doesn't implement `SmartLifecycle`
(just `Lifecycle`) there it doesn't delegate its `start()` to the
`RequestUpgradeStrategy`, e.g. `JettyRequestUpgradeStrategy`.
On the other hand `DefaultHandshakeHandler` can be started as a dependant
`Lifecycle` from some other `SmartLifecycle`, like it happens with the
`WebSocketHandlerMapping`
* Implement `SmartLifecycle` for the `ServerWebSocketContainer` and
delegate its lifecycle to the provided `HandshakeHandler`
* Fix `WebSocketInboundChannelAdapter` to properly implement `doStop()`
with the propagation to the provided `webSocketContainer`
* Fix deprecation warning in the `StompMessageHandlerWebSocketIntegrationTests`
**Cherry-pick to 4.3.x**
bf1fef39db