Enable MongoDbLegacySerializationSnapshotStoreSpec #109
Description
Version: Akka.Persistence.MongoDb v1.4.0-beta3
Need to enable MongoDbLegacySerializationSnapshotStoreSpec in the test suite once akkadotnet/akka.net#4190 gets released into a new version of Akka.NET. v1.4.0-beta5 or later.