* Add set market price during extended market hours
- Set market prices during extended market hours for live trading.
Adding unit test
* Add assert on internal data count
- `UserDefinedUniverse` will no longer be removed as a data subscription.
- When `algorithm.AddData()` is called a universe selection data point
will be added to the `UserDefinedUniverse` subscription to trigger
selection and add the requested data.
- `DataManager` will make sure an active subscriptions
`SubscriptionDataConfig` will be present in the configuration collection
- Adding unit and regression tests
- After removing a `Subscription` entirely, we will now also remove the
matching `SubscriptionDataConfig` from the `SubscriptionManager`
- Adding a new regression test, which fails in `master`
- Fixing previous PR change that removed `Trace` logging when adding
and removing a `Subscription`
- Fixing a bug in the `UserDefinedUniverse` where calling `RemoveMember`
would cause the `SubscriptionDataConfig` to be re added to the
`SubscriptionManager` (not the `DF`). Found this through added
regression test.
Martin-Molinero