Fixes #387 - removes duplicate search summary

- Search results summary was showing up twice on no results page. This
removes the duplicate and changes the test session_helpers to look for
the search-summary class instead of the id (since the floating and
static header both have a search-summary, though they don’t display
concurrently).
- Removes unused styles associated with the search-summary.
Updates tests to work with current testing setting

Cassettes were failing because the test location
ohana-api-test.herokuapp.com returns 1 result per page. This updates
the cassettes and tests to reflect the current configuration of the
testing URL.
Merge branch 'fixes-issues' of https://github.com/codeforamerica/ohana-web-search into fixes-issues

Conflicts:

spec/cassettes/Search_summary/when_visiting_search_results_page_that_doe
s_not_have_results.yml
	spec/support/features/session_helpers.rb