Fixed 2 failures by inceasing have_at_most values

  1) advanced search nested NOT in subject digestive organs NOT disease NOT cancer
     Failure/Error: resp.should have_at_most(100).results
       expected at most 100 results, got 102
     # ./spec/advanced_search_spec.rb:295:in `block (3 levels) in <top (required)>'

  2) advanced search nested NOT in subject with parens
     Failure/Error: resp.should have_at_most(100).results
       expected at most 100 results, got 102
     # ./spec/advanced_search_spec.rb:303:in `block (3 levels) in <top (required)>'
@ndushay