Fix latest merge
Merge pull request #952 from nlegoff/fix_deps

[3.9] Fix jquery-galleria display in homepage
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
Refactor && Typo && Use plain objects as function parameters instead of ids
Fix tests & rename RegistrationDemandMigration class