Fix the AuthorityKeyIdentifier SubCA Issuer for Bouncy Castle CertificateBuilder.

[mregen]

• The missing fix in 6747b47 for the bouncy castle certificate builder which was used in .NET Core 2.1 (eol) and .NET 4.6.2, unnoticed in the tests because windows only uses the keyId to validate the chain.
• AuthorityKeyIdentifier in the SubCA contains the SubjectName of the Issuer instead of the IssuerName. Also an application certificate that is signed by a SubCA would contain the false information.
• The false information has no effect on Windows and macOS, however on linux OpenSSL tests all fields and a chain cannot be fully validated.

[codecov]

Codecov Report

Merging #1677 (5d62721) into master (33ae736) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1677      +/-   ##
==========================================
+ Coverage   53.90%   53.91%   +0.01%     
==========================================
  Files         319      319              
  Lines       57898    57898              
==========================================
+ Hits        31208    31215       +7     
+ Misses      26690    26683       -7     

Impacted Files	Coverage Δ
...ack/Opc.Ua.Core/Stack/Transport/AsyncResultBase.cs	61.61% <0.00%> (-5.06%)	⬇️
...es/Opc.Ua.Server/Diagnostics/MonitoredItemQueue.cs	34.02% <0.00%> (-4.87%)	⬇️
...indings.Https/Stack/Https/HttpsTransportChannel.cs	68.45% <0.00%> (-3.36%)	⬇️
Stack/Opc.Ua.Core/Types/BuiltIn/DiagnosticInfo.cs	60.00% <0.00%> (-1.38%)	⬇️
Libraries/Opc.Ua.Server/Session/SessionManager.cs	71.37% <0.00%> (-1.04%)	⬇️
Stack/Opc.Ua.Core/Types/Utils/ServiceResult.cs	61.68% <0.00%> (-0.94%)	⬇️
...raries/Opc.Ua.Server/Subscription/MonitoredItem.cs	44.02% <0.00%> (-0.61%)	⬇️
...braries/Opc.Ua.Server/Subscription/Subscription.cs	59.68% <0.00%> (+0.11%)	⬆️
.../Opc.Ua.Server/Subscription/SubscriptionManager.cs	61.19% <0.00%> (+0.14%)	⬆️
Libraries/Opc.Ua.Client/Subscription.cs	71.27% <0.00%> (+0.84%)	⬆️
... and 1 more

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