Spring Session Redis should use `Lifecycle` instead of `DisposableBean`

[rwinch]

Using DisposableBean is causing conflicts with Spring Data Redis's Connection factories that have migrated to Lifecycle to start/stop connection pools for snapshotting. Lifecycle.stop is invoked too early for Spring Session. Here are a few related tickets:

spring-projects/spring-data-redis#3076
spring-projects/spring-data-redis#2983

We should look into migrating InitializingBean as well.

cc @mp911de