Reduce instance variables in tmdb_handler_discover_search

Relates to #270

This is an outline of the scope of work needed to reduce the instance variables generated by and perpetuated by the tmdb_handler_discover_search method:

[x] tmdb_handler_discover_search
- generates these instance variables:
- @actor
- @actor1_id
- @actor1_url
- @actor1_search_result
- @actor2
- @actor2_id
- @actor2_url
- @actor2_search_result
- @year_search
- @exact_year
- @after_year
- @before_year
- @genre
- @company
- @mpaa_rating
- @sort_by
- @page
- @year_select
- @not_found
- @people
- @discover_url
- @discover_results
- @movies
- @total_pages
- @page
- @previous_page
- @next_page
- inherits instance variables from
- [x] MovieSearch.parse_results
- is called by:
- [x] tmdb_controller#actor_search
  - renders in views:
  - [x] actor_search.html.erb: @actor, @actor2, @not_found, @movies, @page, @total_pages, @previous_page, @next_page
    - [x] partial: movie_partial_loop: @movies as local
- [x] tmdb_controller#two_actor_search
  - renders in views:
  - [x] two_actor_search.html.erb: @actor, @not_found, @actor1_id, @movies, @page, @total_pages, @previous_page, @next_page
    - [x] partial: movie_partial_loop: @movies as local
- [x] tmdb_controller#discover_search
  - renders in views:
  - [x] discover_search.html.erb: @movies, @not_found, @params_for_view, @page, @total_pages, @previous_page, @next_page, @sort_by, @date, @genre, @actor, @actor2, @company, @mpaa_rating, @year_select
    - [x] partial: movie_partial_loop: @movies as local

mikevallano / tmdb-moviequeue

Reduce instance variables in tmdb_handler_discover_search #274