Let's Encrypt certificate not requested if mail field is empty

[gsanchietti]

The fix for #5455 introduced a regression bug: if the mail field is empty, the Let's Encrypt certificate is not requested.

Steps to reproduce

• Configure a machine where all Let's Encrypt requirements are satisfied
• Access the "Server Manager" and go to "Server certificate" page
• Click on the top-left button and select "Request Let's Encrypt certificate"
• Make sure the "Notification email" field is empty
• Submit the form

Expected behavior

The certificate must be generated.

Actual behavior

The UI starts the spinner and returns to certificate list, but LE certificate is not generated.

Components

nethserver-base-3.1.4-1.ns7.noarch
nethserver-letsencrypt-1.1.6-1.ns7.noarch

[nethbot]

in 7.4.1708/testing:

• nethserver-base-3.1.4-1.3.gd2096c6.ns7.noarch.rpm

[gsanchietti]

Test case
The bug should not be reproducible.

[DavidePrincipi]

VERIFIED

[nethbot]

in 7.4.1708/updates:

• nethserver-base-3.1.5-1.ns7.noarch.rpm