PluralAttribute#isAssociation returns true for @ElementCollection

the method is implemented to always return true:

org.hibernate.jpa.internal.metamodel.PluralAttributeImpl

but it should be:

org.hibernate.jpa.internal.metamodel.PluralAttributeImpl

to exclude @ElementCollection attributes, which are NOT associations in terms of entity model, just like @Embedded attributes are not associations for SingularAttribute