MDL-47494 question_ddwtos: Remove @ou tags from behat.

question/type/ddwtos/tests/behat/add.feature

-@ou @ou_vle @qtype @qtype_ddwtos
+@qtype @qtype_ddwtos
 Feature: Test creating a drag and drop into text question
   As a teacher
   In order to test my students

question/type/ddwtos/tests/behat/backup_and_restore.feature

-@ou @ou_vle @qtype @qtype_ddwtos
+@qtype @qtype_ddwtos
 Feature: Test duplicating a quiz containing a drag and drop into text question
   As a teacher
   In order re-use my courses containing drag and drop into text questions

question/type/ddwtos/tests/behat/edit.feature

-@ou @ou_vle @qtype @qtype_ddwtos
+@qtype @qtype_ddwtos
 Feature: Test editing a drag and drop into text questions
   As a teacher
   In order to be able to update my drag and drop into text questions

question/type/ddwtos/tests/behat/export.feature

-@ou @ou_vle @qtype @qtype_ddwtos
+@qtype @qtype_ddwtos
 Feature: Test exporting drag and drop into text questions
   As a teacher
   In order to be able to reuse my drag and drop into text questions

question/type/ddwtos/tests/behat/import.feature

-@ou @ou_vle @qtype @qtype_ddwtos
+@qtype @qtype_ddwtos
 Feature: Test importing drag and drop into text questions
   As a teacher
   In order to reuse drag and drop into text questions

question/type/ddwtos/tests/behat/preview.feature

-@ou @ou_vle @qtype @qtype_ddwtos
+@qtype @qtype_ddwtos
 Feature: Preview a drag-drop into text question
   As a teacher
   In order to check my drag-drop into text questions will work for students