Move substituion logger from class method to controllers
Fix #1414 Add immediate thumbnail substitution after success download
Fix CS
Use temporary file system
Fix & enhance unit tests
Adressed @romainneutron 's comments
Merge pull request #562 from nlegoff/fix_1414

[3.8] Fix 1414 Add immediate thumbnail substitution after success download
Update entity proxies
Update SQLite reference
Merge pull request #589 from nlegoff/proxies

[3.9] Update entity proxies
Fix ftp connection test experience
Remove warnings in case of failure
Fix CS
Merge pull request #594 from romainneutron/ftp-export-ux

[3.9] Fix ftp connection test experience
Merge pull request #596 from romainneutron/ftp-exceptions

[3.9] Remove warnings in case of failure
Fix usage of task manager in strict standards context
Merge pull request #595 from romainneutron/task-manager-fix

[3.9] Task manager fix
Fix Sqlite db regeneration in case of deleted db
Fix CS
Add missing proxies