Application config improvements for cert recreation

[mregen]

• do not silent recreate a certificate if a matching cert subject is available, enforce manual deletion or replacement
• allow the application cert to be used when expired or not yet valid
• warn/assert if an app cert is loaded without loading the private key
  fixes Prevent false use of loading the application certificate, causing 'Keyset not valid' error. (Windows) #1162 , fixes ApplicationInstance.CheckApplicationInstanceCertificate side effect #1102

[lgtm-com]

This pull request introduces 2 alerts when merging d137a84 into 33ae8bb - view on LGTM.com

new alerts:

• 1 for Constant condition
• 1 for Missing Dispose call on local IDisposable

[lgtm-com]

This pull request introduces 2 alerts when merging ede6459 into 33ae8bb - view on LGTM.com

new alerts:

• 1 for Constant condition
• 1 for Missing Dispose call on local IDisposable

[lgtm-com]

This pull request introduces 4 alerts when merging d4765b1 into 33ae8bb - view on LGTM.com

new alerts:

• 2 for Missing Dispose call on local IDisposable
• 1 for Constant condition
• 1 for Poor error handling: empty catch block

[mregen]

remove debug assert...

[codecov]

Codecov Report

Merging #1525 (531f112) into master (33ae8bb) will increase coverage by 0.03%.
The diff coverage is 88.70%.

@@            Coverage Diff             @@
##           master    #1525      +/-   ##
==========================================
+ Coverage   52.96%   52.99%   +0.03%     
==========================================
  Files         308      317       +9     
  Lines       58395    60329    +1934     
==========================================
+ Hits        30928    31974    +1046     
- Misses      27467    28355     +888     

Impacted Files	Coverage Δ
...ificates/X509Certificate/CertificateBuilderBase.cs	88.23% <ø> (+1.17%)	⬆️
...a.Core/Security/Certificates/CertificateFactory.cs	86.15% <40.00%> (-1.15%)	⬇️
...ore/Security/Certificates/CertificateIdentifier.cs	25.57% <50.00%> (-0.48%)	⬇️
...a.Configuration/ApplicationConfigurationBuilder.cs	66.55% <100.00%> (-1.10%)	⬇️
...raries/Opc.Ua.Configuration/ApplicationInstance.cs	60.80% <100.00%> (+2.19%)	⬆️
...ecurity/Certificates/CertificateStoreIdentifier.cs	73.52% <100.00%> (ø)
...Core/Security/Certificates/CertificateValidator.cs	78.06% <100.00%> (+0.60%)	⬆️
Libraries/Opc.Ua.PubSub/PublishedData/DataSet.cs	16.66% <0.00%> (-83.34%)	⬇️
...raries/Opc.Ua.PubSub/Transport/UdpClientCreator.cs	12.23% <0.00%> (-6.25%)	⬇️
...aries/Opc.Ua.PubSub/Encoding/UadpDataSetMessage.cs	74.94% <0.00%> (-5.30%)	⬇️
... and 30 more

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[lgtm-com]

This pull request introduces 4 alerts when merging ea5cd21 into 33ae8bb - view on LGTM.com

new alerts:

• 2 for Missing Dispose call on local IDisposable
• 1 for Constant condition
• 1 for Poor error handling: empty catch block

[cristipogacean]

LGTM

[lgtm-com]

This pull request introduces 2 alerts when merging 531f112 into 75744e2 - view on LGTM.com

new alerts:

• 1 for Constant condition
• 1 for Poor error handling: empty catch block