Calling .select on HasManyAssociation should not be private

[awead]

Failing example:

>  library.books.count
=> 2
>  library.books.select([:id])
=> NoMethodError Exception: private method `select' called for #<ActiveFedora::Associations::HasManyAssociation:0x007ffec32364b8>

[jrgriffiniii]

Sorry, but has this been resolved? If so, the test for it is still pending: https://github.com/samvera/active_fedora/blob/master/spec/integration/collection_association_spec.rb#L94