Since OpenSSL 1.1 those broken certificates became a problem during testing,
so regenerate them with new OpenSSL.

certificate generated with (key.pem has been extracted from the test file):
openssl req -new -key key.pem -x509 -nodes -days 3560
-out certificate.pem -subj "/C=UL/ST=Bee Yard/O=Bee-Keeper Ltd./OU=Honey
Harvester/CN=Maya the Bee/emailAddress=Maya the Bee"

alternate_certificate generated with:
openssl req -newkey rsa:2048 -keyout /dev/null -x509 -nodes -days 3560
-out alternate_certificate.pem -subj "/C=FR/ST=Default Province/O=Nexedi"