Don't add language of original as language of translated Edition (#79)

Task: https://phabricator.wikimedia.org/T228489

It confused the language of original with actual language of the edition,
adding both.

Fixed in the live URI version. Will have to be tested in the local batch version, to
see if the problem occurs there as well.

importer/Edition.py

@@ -267,13 +267,13 @@ def set_language(self):
         lang_map = self.data_files["languages"]
         if self.mode == "uri":
             found_languages = []
-            for el in self.raw_data:
-                graph = el.get("@graph")
-                if graph and len(graph) > 1:
-                    for el in graph[1]:
-                        if graph[1][el] == "Language":
-                            found_languages.append(graph[1].get("langCode"))
-
+            text_record = [
+                x for x in self.raw_data if x.get("@type") == "Text"]
+            for tr in text_record:
+                raw_languages = tr.get("language")
+                for rl in raw_languages:
+                    if rl.get("@id"):
+                        found_languages.append(rl["@id"].split("/")[-1])
             if found_languages:
                 for lang in found_languages:
                     lang_q = [x.get("q")