PIM-3443: Fix prices export and add spec
Merge pull request #1855 from akeneo/PIM-3443-2

PIM-3443: Fix prices export and add spec
PIM-3446: limit the warning display to 100 in import/export
Merge pull request #1857 from akeneo/PIM-3446

PIM-3446: limit the warning display to 100 in import/export
Preparing version 1.2.14
Merge pull request #1860 from akeneo/1_2_14

Preparing version 1.2.14
PIM-3452: Remove useless code
Merge pull request #1863 from akeneo/PIM-3452

PIM-3452: Remove useless code