Merge pull request #1872 from akeneo/PIM-3473

PIM-3473: Fix date picker year range selection over next year
[phpDoc]: fixed reference to Product (should be ProductInterface) in ProductManager and ProductRepositoryInterface
PIM-3475: Fix attribute options sort order in import/export
Merge pull request #1875 from alafon/doc-productmanager

[phpDoc]: fixed reference to Product (should be ProductInterface) in Pro...
PIM-3475: Fix export behat and polish
Preparing version 1.2.15
PIM-3417: allow to use the YamlReader for real imports
Improve exception messages for updaters
Merge pull request #1881 from akeneo/PIM-3063

PIM-3417: allow to use the YamlReader for real imports
PIM-3508 : take context in account to identify an entity to version
Merge pull request #1882 from akeneo/PIM-3508-many-versions-per-request

PIM-3508 : take context in account to identify an entity to version
PIM-3475: Add phpspec to the new class
Merge pull request #1877 from akeneo/PIM-3475

PIM-3475: Fix attribute options sort order in import/export
PIM-3063: fix the batch bundle display of errors
PIM-3063: allow file upload for Yaml reader
PIM-3063: count number of read items for Yaml reader
Merge pull request #1884 from akeneo/PIM-3063

PIM-3063: fix Yaml reader
Merge pull request #1883 from akeneo/PIM-3063-fix-batch-display

PIM-3063: fix the batch bundle display of errors
Merge branch 'PIM-3475' into PIM-3475-merge

Conflicts:
	features/export/export_options.feature
	spec/Pim/Bundle/TransformBundle/Normalizer/Flat/AttributeOptionNormalizerSpec.php
	spec/Pim/Bundle/TransformBundle/Normalizer/Structured/AttributeOptionNormalizerSpec.php
	src/Pim/Bundle/InstallerBundle/Resources/fixtures/icecat_demo/attribute_options.yml
	src/Pim/Bundle/InstallerBundle/Resources/fixtures/icecat_demo_dev/attribute_options.yml
	src/Pim/Bundle/TransformBundle/Normalizer/Structured/AttributeOptionNormalizer.php
Merge pull request #1880 from akeneo/improve-updater-exceptions

Improve exception messages for updaters