Move licence finder check to model

Allows us to check for the licence finder beyond the QueryBuilder class.
The ContentItem model also seems a more appropriate place to verfiy the
exact finder content item..

app/lib/search/query_builder.rb

@@ -135,7 +135,7 @@ def remove_stopwords?
     end
 
     def stopwords_for_path
-      licence_transaction_path? ? LICENCE_STOPWORDS : []
+      finder_content_item.is_licence_transaction? ? LICENCE_STOPWORDS : []
     end
 
     def remove_stopwords
@@ -243,7 +243,7 @@ def ab_query
       # We're using the ab test relevance:disable params here to turn off LTR for this
       # finder. It would probably be best in the long run to create a specific way of
       # doing this that uses a proper parameter, but we can't do that at the moment.
-      ab_params.merge!("relevance" => "disable") if licence_transaction_path? && !force_ltr?
+      ab_params.merge!("relevance" => "disable") if finder_content_item.is_licence_transaction? && !force_ltr?
       ab_params.any? ? { "ab_tests" => ab_params.map { |k, v| "#{k}:#{v}" }.join(",") } : {}
     end
 
@@ -252,15 +252,11 @@ def suggest_query
     end
 
     def boost_fields_query
-      return {} unless licence_transaction_path?
+      return {} unless finder_content_item.is_licence_transaction?
 
       { "boost_fields" => "licence_transaction_industry" }
     end
 
-    def licence_transaction_path?
-      finder_content_item.base_path == "/find-licences"
-    end
-
     def force_ltr?
       params["force-ltr"] == "true"
     end

app/models/content_item.rb

@@ -152,6 +152,10 @@ def government_content_section
     base_path.split("/")[2]
   end
 
+  def is_licence_transaction?
+    base_path == "/find-licences"
+  end
+
 private
 
   attr_reader :content_item_hash