Fixed failures by increasing the number of results rows and have_at_most values

 1) Default Request Handler Lectures on the Calculus of Variations and Optimal Control Theory
     Failure/Error: resp.should have_at_most(160).results
       expected at most 160 results, got 161
     # ./spec/default_req_handler_spec.rb:114:in `block (2 levels) in <top (required)>'

  2) Series Search lecture notes in computer science
     Failure/Error: resp.should have_at_most(8200).results
       expected at most 8200 results, got 8251
     # ./spec/series_search_spec.rb:10:in `block (2 levels) in <top (required)>'

1) sorting results empty query with facet format_main_ssim:Book; default sort should be by pub date desc then title asc
     Failure/Error: resp.should include('10343020').before('10343019')
 # ./spec/sort_spec.rb:22:in `block (3 levels) in <top (required)>'