PIM-2127 : add product value normalizer (used to store indexed value)
PIM-2127 : add attribute option normalizer
PIM-2127 : update product normalizer to normalize values as indexed
array
PIM-2127 : declare new normalizers
PIM-2127 : add product price normalizer
PIM-2127 : cosmetic
PIM-2127 : fix product normalizer specs
PIM-2127 : add attribute option normalizer spec
PIM-2127 : add product price normalizer spec
PIM-2127 : add productvaluenormalizer specs
PIM-2127 : fix CS
PIM-2127 : fix option and price normalizers (not serializer aware)
Merge pull request #866 from akeneo/mongo/normalizers

Add bson normalizers to store indexed values (MongoDB support)
Merge branch 'master' into PIM-1864