(fix #1897) : skip server SSL certs verification when configured

[dolifer]

An attempt to fix #1897

I've updated RestService to respect theenableSslCertificateVerification option, even when there are no client certificates provided.

This ensures that in case of self-signed certificate, we can get schema from schema-registry, by skiping certificate validation.

[cla-assistant]

All committers have signed the CLA.

[dolifer]

@mhowlett hello, here is my attempt to fix the issue with certificates validation.

[jorgebg90]

Hello,
Is there any update on this? @dolifer your solution jumps over the self-signed certificate or uses the specified one with the property SslCaLocation?

Thanks in advance :)

[dolifer]

@jorgebg90 it's jumps over, and skips the validation at all by using custom ServerCertificateCustomValidationCallback which "trusts" ANY given certificate.