Add explicit `references()` directive in tests for Rails 4.1 compat
Add explicit `references()` directive in tests for Rails 4.1 compat

Rails 4.1 no longer scans the SQL conditions string to detect referenced
tables. To fix existing tests, manually specify the referenced tables.

lloydmeta/will_paginate,solanolabs/will_paginate,jonatack/will_paginate,kirs/will_paginate,betterplace/will_paginate,lloydmeta/will_paginate,solanolabs/will_paginate,xingxing/will_paginate,sideci-sample/sideci-sample-will_paginate,BenjamH/will_paginate,ThiagoLelis/will_paginate,notonthehighstreet/will_paginate,mislav/will_paginate,betterplace/will_paginate,CloudVLab/will_paginate,poporul/will_paginate,kirs/will_paginate,CloudVLab/will_paginate,mislav/will_paginate,poporul/will_paginate,ThiagoLelis/will_paginate,notonthehighstreet/will_paginate,BenjamH/will_paginate,xingxing/will_paginate,jonatack/will_paginate,sideci-sample/sideci-sample-will_paginate