They are faster and they provide a easier-to-use standalone voms-proxy-fake.
Moreover the Java clients have some issues at the moment and its equivalent
of voms-proxy-fake doesn't work well.

Added voms-clients-java

Try to create two rpm, one for ngx with httpg patch, one for voms module

gitlab-ci and readme need to be updated

This script is used during the CI.

It is moved from .devocontainer to docker folder, probably this is not the correct place.

The script can be used both for the devcontainer and for the continuous
integration.