JIRA: https://jira.spring.io/browse/INT-3792 * Remove `Serializable` requirement for `ThreadStatePropagationChannelInterceptor` generic type * Increase `PriorityChannelTests` timeout
JIRA: https://jira.spring.io/browse/INT-3792 * Remove `Serializable` requirement for `ThreadStatePropagationChannelInterceptor` generic type * Increase `PriorityChannelTests` timeout