Fix #1667 Admin tree is not reloaded when empty action is triggered
Fix #1670 API password grant type authentication is broken
Merge pull request #882 from nlegoff/fix-1667

[3.8] Fix #1667 Admin tree is not reloaded when empty action is triggered
Fix migration to version 3.8
Fix #1650 insufficient line-height in email template
Merge pull request #889 from romainneutron/fix-upgrade

[3.8] Fix migration to version 3.8
Fix #1672 Fix uninitialized variable in XsendFileMapiingGenerator
Merge pull request #890 from romainneutron/task-manager-messages

[3.8] Fix task manager messages log levels
Fix #1675 Display issue in registration template
Merge pull request #893 from nlegoff/fix-1672

[3.8] Fix #1672 Fix uninitialized variable in XsendFileMapiingGenerator
Merge pull request #891 from nlegoff/fix-1650

[3.8] Fix #1650 insufficient line-height in email template
Merge pull request #894 from nlegoff/fix-1675

[3.8] Fix #1675 Display issue in registration template
Permalink controller cleanup
Add travis_retry command use
Merge pull request #895 from romainneutron/travis_retry

[3.8] Add travis_retry command use
Merge pull request #892 from romainneutron/permalinks-cleanup

[3.8] Permalink controller cleanup
Merge pull request #896 from romainneutron/remove-truncate

[3.8] Remove TRUNCATE in favor of DELETE FROM
Merge pull request #883 from nlegoff/fix-1670

[3.8] Fix #1670 API password grant type authentication is broken
Fix generated twig paths for plugins : make them relative