PIM-3471 : Add an error log when the max number of indexes is reached
for mongo product collection
PIM-3369: import products - couple channel/locale doesn't exist - the import succeeds
Merge pull request #1894 from akeneo/PIM-3471-mongo-indexes

PIM-3471 : add a error log when we reach the max indexes of a mongo collection
PIM-3369: add behat for import
PIM-3447 Fix behat scenario
Merge branch 'PIM-3369' into 1.2

Conflicts:
	CHANGELOG.md
PIM-3368: Fix association transformer
Merge pull request #1891 from akeneo/PIM-3368

PIM-3368: Fix association transformer
PIM-3458 Automatically set next sort order when creating an attribute group