Retrieve controller/action from payload hash

We were unnecessarily retrieving the controller and action parameters
from the nested `params` when we could simply retrieve it from the
top-level payload.

Closes #172.

lib/lograge.rb

@@ -62,8 +62,8 @@ def before_format(data, payload)
 
   def ignore_actions(actions)
     ignore(lambda do |event|
-             params = event.payload[:params]
-             Array(actions).include?("#{params['controller']}##{params['action']}")
+             params = event.payload
+             Array(actions).include?("#{params[:controller]}##{params[:action]}")
            end)
   end
 

lib/lograge/log_subscriber.rb

@@ -45,8 +45,8 @@ def initial_data(payload)
         method: payload[:method],
         path: extract_path(payload),
         format: extract_format(payload),
-        controller: payload[:params]['controller'],
-        action: payload[:params]['action']
+        controller: payload[:controller],
+        action: payload[:action]
       }
     end
 

spec/lograge_logsubscriber_spec.rb

@@ -12,7 +12,7 @@
   end
 
   let(:subscriber) { Lograge::RequestLogSubscriber.new }
-  let(:event_params) { { 'controller' => 'home', 'action' => 'index', 'foo' => 'bar' } }
+  let(:event_params) { { 'foo' => 'bar' } }
 
   let(:event) do
     ActiveSupport::Notifications::Event.new(
@@ -21,6 +21,8 @@
       Time.now,
       2,
       status: 200,
+      controller: 'home',
+      action: 'index',
       format: 'application/json',
       method: 'GET',
       path: '/home?foo=bar',