introduce StateTransferInitializerModule - doesn't include to 5.0.0-beta.7 release

[ArikEpstein]

- [ x] bug report
- [ ] feature request
- [ ] support request => Please do not submit support request here, see note at the top of this template.

• What modules are related to this Issue?

- [ ] aspnetcore-engine
- [x ] common
- [ ] express-engine
- [ ] hapi-engine
- [ ] module-map-ngfactory-loader

• Do you want to request a feature or report a bug?
  Bug report

• What is the current behavior?
  according the new release 5.0.0-beta.7 on change log.
  https://github.com/angular/universal/blob/master/CHANGELOG.md

There is new feature

• common: introduce StateTransferInitializerModule (#916) (5aef476)
  But
  introduce StateTransferInitializerModule - doesn't include to 5.0.0-beta.7 release

[Toxicable]

This feature was not intended to be apart of this release, it's going into v6 instead.

[ArikEpstein]

Thanks @Toxicable will wait for v6 release.

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