[Rails5] Fixes for ActionDispatch::Routing::INSECURE_URL_PARAMETERS_MESSAGE

[harryPL]

While migrating my app to Rails 5 I encountered on ActionDispatch::Routing exception. This PR removes the deprecation warnings associated with the merge! method. It also removes the ActionDispatch::Routing exception. The exact message of the exception is "

Attempting to generate a URL from non-sanitized request parameters! An attacker can inject malicious data into the generated URL, such as changing the host. Whitelist and sanitize passed parameters to be secure."

The problem is present due to changes to ActionController::Parameters in Rails 5.

Excerpt from the framework calls

actionpack (5.0.0) lib/action_dispatch/routing/url_for.rb:176:in url_for' /home/pfurman/.rvm/gems/ruby-2.3.1@rails5/bundler/gems/wice_grid-f3d6c462af2b/lib/wice/grid_renderer.rb:550:inbase_link_for_filter'
/home/pfurman/.rvm/gems/ruby-2.3.1@rails5/bundler/gems/wice_grid-f3d6c462af2b/lib/wice/helpers/wice_grid_view_helpers.rb:471:in grid_html' /home/pfurman/.rvm/gems/ruby-2.3.1@rails5/bundler/gems/wice_grid-f3d6c462af2b/lib/wice/helpers/wice_grid_view_helpers.rb:124:indefine_grid'
actionview (5.0.0) lib/action_view/template.rb:158:in `block in render'

[coveralls]

Coverage remained the same at 37.512% when pulling 4c35b14 on harryPL:rails3 into f3d6c46 on leikind:rails3.

[leikind]

👍 thank you