Fix test_extract_copied_mapping_from_history

... by copying the history instead of its contents.

With the change of copying hdca contents by default we'd otherwise have
find the right hids, which isn't really what this test is about.

lib/galaxy_test/api/test_workflow_extraction.py

@@ -97,17 +97,14 @@ def test_extract_mapping_workflow_from_history(self, history_id):
         self.__assert_looks_like_randomlines_mapping_workflow(downloaded_workflow)
 
     def test_extract_copied_mapping_from_history(self, history_id):
-        old_history_id = self.dataset_populator.new_history()
-        hdca, job_id1, job_id2 = self.__run_random_lines_mapped_over_pair(old_history_id)
+        hdca, job_id1, job_id2 = self.__run_random_lines_mapped_over_pair(history_id)
 
-        old_contents = self._history_contents(old_history_id)
-        for old_content in old_contents:
-            self.__copy_content_to_history(history_id, old_content)
+        new_history_id = self.dataset_populator.copy_history(history_id).json()["id"]
         # API test is somewhat contrived since there is no good way
         # to retrieve job_id1, job_id2 like this for copied dataset
         # collections I don't think.
         downloaded_workflow = self._extract_and_download_workflow(
-            history_id,
+            new_history_id,
             dataset_collection_ids=[hdca["hid"]],
             job_ids=[job_id1, job_id2],
         )