Normalized the channel's conversion units
Change flag icon background position to computed instead of hardcoded
Reuse some less variables
Change behat scenario in an attempt to prevent random failure
Clear a field before setting the value in behat
Increase metric field size for unit
Merge branch 'master' of github.com:akeneo/pim-community-dev
Merge branch 'master' into add_UT
Add UT for Date attribute type
Add UT for FileType