Reports: use field name as header instead of translated value for raw renders (csv, json)

lib/reporting/report_headers_builder.rb

@@ -29,6 +29,8 @@ module Reporting
     private
 
     def translate_header(key)
+      return key.to_s if report.raw_render?
+
       # Quite some headers use currency interpolation, so providing it by default
       default_params = { currency: currency_symbol, currency_symbol: currency_symbol }
       report.custom_headers[key] || I18n.t("report_header_#{key}", **default_params)

spec/lib/reports/report_spec.rb

@@ -79,7 +79,7 @@ module Reporting
       end
 
       describe "fields_to_hide" do
-        let(:params) { { fields_to_hide: [:product], report_format: 'json' } }
+        let(:params) { { fields_to_hide: [:product] } }
 
         it "works" do
           @expected_headers = ['Hub', 'Price']