Add host configuration
Update fixtures
Force plugin configuration in configuration
Update bin/console to bin/setup
Add enable/disable plugins commands
Bump to version 3.9.0-alpha.12
Merge pull request #967 from nlegoff/fix1701

[3.8] Fix #1701 Add missing trans filter
Fix configuration usage
Merge pull request #962 from nlegoff/websocket-js

[3.9] Add web-socket-js as project dependency
Fix host configuration
Use Doctrine DBAL instead of custom connection
Merge pull request #966 from romainneutron/plugin-disable

[3.9] Add commands to enable/disable plugins
Merge pull request #968 from romainneutron/doctrine-connection

[3.9] Use Doctrine DBAL as connection
Merge branch '3.8'
Merge pull request #965 from romainneutron/host-configuration

[3.9] Add configuration per host
Migrate demand table to doctrine entity && refactor registration API
Fix neutron's comment
Fix tests, CS && typo
Rename RegistrationManager to RegistrationManipulator
Adressed Neutron's comments