PIM-918 : update attribute export format (one column per translated
label)
PIM-918 : add attribute option normalizer
PIM-918 : add flat attribute option normalizer
PIM-918 : add attribute option export
PIM-918 : add is_default column in attribute option export
PIM-918 : add new jobs to import attribute and import attribute option
Merge branch 'master' into PIM-918

Conflicts:
	src/Pim/Bundle/ImportExportBundle/Resources/config/connectors.yml
PIM-918 : fix heterogeneous csv that depends on column translations
Merge branch 'master' into PIM-918

Conflicts:
	src/Pim/Bundle/ImportExportBundle/Resources/config/connectors.yml
PIM-918 : fix product write count
PIM-918 : add attribute option import job
PIM-918 : add create / update count in the basic ORM writer
PIM-918 : add versioning context to normalizer
PIM-918 : add attribute import job (only update for now)
PIM-918 : update change log
PIM-918 : remove useless use statements
Merge branch 'master' into PIM-918
PIM-918 : refactor attribute processor
PIM-918 : fix normalizers tests
PIM-918 : remove step execution aware in attribute processor and use
invalid item exception