Adapted faq.md for CNTI migration

Refs lfn-cnti#75

Pre-submission checklist:

Please check each of these after submitting your pull request:

[ ] If this is a new entry, have you submitted a signed participation form?
[ ] Did you include the product/project logo in SVG, EPS or AI format?
[ ] Does your logo clearly state the name of the product/project/org and follow the other logo guidelines?
[ ] If your product/project is open source, did you include the repo_url?
[ ] Did you copy and paste the installation and configuration instructions into the README.md file in addition to linking to them?