Set a test hostname
Set a test hostname

The tests rely on being able to build urls for email
etc so set the `CERTIFICATE_HOSTNAME` to something
that is not blank.
zoul/open-data-certificate,theodi/open-data-certificate,istvan-antal/open-data-certificate,zoul/open-data-certificate,Motejl/open-data-certificate,ahmadassaf/open-data-certificate,zoul/open-data-certificate,zoul/open-data-certificate,theodi/open-data-certificate,ahmadassaf/open-data-certificate,Motejl/open-data-certificate,istvan-antal/open-data-certificate,theodi/open-data-certificate,Motejl/open-data-certificate,ahmadassaf/open-data-certificate,ahmadassaf/open-data-certificate,theodi/open-data-certificate,Motejl/open-data-certificate,istvan-antal/open-data-certificate