Merge pull request #964 from akarnokd/SubjectSubscriptionManagerFix

SubjectSubscriptionManager fix.
Version 0.17.1
Notifications for the allocation adverse.
Merge pull request #970 from abersnaze/notification-lite

Notifications for the allocation adverse.
Merge with Serialize

- concurrency unit tests
- handle Observable that emits onComplete multiple times
Merge pull request #973 from benjchristensen/merge-handle-bad-observable

Merge with Serialize - Handle Bad Observables