Do not hardcode default capath for the scripts
The scripts do not play nicely with the X509_CERT_DIR
environment variable because they hardcode as default /etc/grid-security/certificates
. So this part of the code never get a chance to check the environment
https://gitlab.cern.ch/fts/fts-rest-flask/-/blob/develop/src/fts3/rest/client/request.py#L40-45