[v7r3] Tests: remove the email address of the self generated certificates

[chaen]

The proxies generated with the self signed test users were not following the RFC3820 (see details bellow). This went unnoticed because this specific part of the RFC is only enforced since openssl 1.1 series (openssl/openssl@c822353.

The specific part we are not respecting is section 3.4

   The subject field of a Proxy Certificate MUST be the issuer field
   (that is the subject of the Proxy Issuer) appended with a single
   Common Name component.

This is the certificate we were generating:

[dirac@server user]$ openssl x509 -in /home/dirac/ServerInstallDIR/user/client.pem -noout -subject -issuer
subject=C = ch, O = DIRAC, OU = DIRAC CI, CN = ciuser, emailAddress = lhcb-dirac-ci@cern.ch
issuer=O = DIRAC CI, CN = DIRAC CI Signing Certification Authority

And this is the proxy that comes out of it

[dirac@server user]$ openssl x509 -in /tmp/x509up_u1000 -noout -subject -issuer
subject=C = ch, O = DIRAC, OU = DIRAC CI, CN = ciuser/emailAddress=lhcb-dirac-ci@cern.ch, CN = 4091627920
issuer=C = ch, O = DIRAC, OU = DIRAC CI, CN = ciuser, emailAddress = lhcb-dirac-ci@cern.ch

As you can see, it does not follow the description above.

So to fix this, I just removed the email bit from the test config.

it should fix #5003

BEGINRELEASENOTES
*Test
CHANGE: don't use mail in the self generated certificates

ENDRELEASENOTES