kuksa-val: add regenerated server certificate

After fixing the issue with the SSL context purpose in the Python
client library, client connections were still failing with the
error:

  certificate verify failed: IP address mismatch, certificate is not valid for localhost

To fix this, the certificate generation script has been patched to
create the now required Subject Alt Name extension field, as that has
effectively replaced using the CN field in most SSL implementations.
Replacement Server.key and Server.pem files generated with the
updated script have been added to give us a working configuration
while this is worked with upstream so their default configuration is
usable with newer Python + OpenSSL versions.

Bug-AGL: SPEC-4467

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I9e8374fbbef6e8570b16d87f4e1800ceba8aacad