updated phpdoc
Rename ProductAssociation to Association
Added unit tests and removed unused methods
Added unit tests
Added tests and unit tests
Remove flush that caused Association to be saved when product was only edited
Merge pull request #629 from akeneo/refactor/productassociation_to_association

Rename ProductAssociation to Association
Rename missing associations fixtures
Remove some last items of old ProductAssociation name
Fix phpcs
PMD : fix long variable
Merge branch 'master' into oro/grid

Conflicts:
	src/Pim/Bundle/CatalogBundle/Resources/config/datagrid.yml
	src/Pim/Bundle/CatalogBundle/Resources/config/entities.yml