Updates specs to use new rails5 format.
The old format:
`get :show, { some: params }, { some: headers }`
The new format:
`get :show, params: { some: params }, headers: { some: headers }`
We need to preload the ancestors of search results after applying
pagination limits. This way the search results itself are paginated,
but not the ancestors.
If we don't do this, we might not preload a parent group of a search
result as it has been cut off by pagination.
