ods_style: fix support of untranslatable_columns

 - the test was using wrong attribute and it was using DummyLocalizer,
which breaks the site configuration. Fix the test and use mock
 - fix ods style not to translate untranslatable columns
4 jobs for fix/libreoffice7-percentage in 0 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner1

01:13:21

passed ERP5.PerformanceTest-TestRunner1

00:34:23

failed ERP5.UnitTest-TestRunner1

02:01:57

failed ERP5.UnitTest-Zope2-ForTestRunner1

04:06:39