Renamed AesManaged to Aes, removed obsolete test report config

Updated documentation of subscribing to all in CQRS flow sample.

Merge pull request #8 from EventStore/feature/crypto_shredding

Added samples for Protecting Sensitive Data in Event-Sourced Systems with Crypto Shredding

Merge pull request #6 from EventStore/cqrs_flow/dotnet/refactoring

Refactoring of the CQRS Flow .NET example based on the feedback

Removed GuardClasses package

Updated docker image to 21.6