Merge branch 'feature/562-SET-signature-check' of https://git.fitko.de/fit-connect/sdk-dotnet into feature/562-SET-signature-check

# Conflicts:
#	BasicUnitTest/SecurityEventTokenTests.cs
#	BasicUnitTest/SenderTests.cs
#	E2ETest/RejectSubmissionTest.cs
#	FitConnect/Client.cs
#	FitConnect/Encryption/FitEncryption.cs
#	FitConnect/FitConnectClient.cs
#	FitConnect/Interfaces/IFitConnectClient.cs
#	FitConnect/Interfaces/Sender/ISenderWithService.cs
#	FitConnect/Models/Callback.cs
#	FitConnect/Models/FitConnectEnvironment.cs
#	FitConnect/Models/SecurityEventToken.cs
#	FitConnect/Router.cs
#	FitConnect/Sender.cs
#	FitConnect/Services/Interfaces/ISelfServicePortalService.cs
#	FitConnect/Services/Models/v1/Routes/Routes.cs
#	FitConnect/Services/SelfServicePortalService.cs
#	FitConnect/Services/SubmissionService.cs
#	FitConnect/Subscriber.cs
#	IntegrationTests/JwtTokenValidation.cs

# Conflicts:
#	BasicUnitTest/SecurityEventTokenTests.cs
#	BasicUnitTest/SenderTests.cs

Added warning to add actual data to SETs

JsonSchema validation working

Changed result for metadata verification

Moved metadata validation to JsonHelper class

Changed Logger Console in MockContainer

Resolving warnings

Resolving warnings

Getting destination ID missing

Downloading signature validation keys

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