Merge pull request #597 from romainneutron/sqlite

[3.9] Fix Sqlite db regeneration in case of deleted db
Merge pull request #598 from romainneutron/fix-cs

[3.9] Fix entities CS
Merge pull request #599 from romainneutron/missing-proxies

[3.9] Add missing proxies
Add FtpExport entities
Add FtpExport entities
Add FtpExport repositories
Switch to FtpExport entities
Remove ftp entities