pithos: Suppress value from modular backend

Suppress 'is_snapshot' return value from modular backend
get_object_hashmap function.

snf-pithos-app/pithos/api/dispatch.py

@@ -39,7 +39,7 @@ def update_md5(m):
         meta = backend.get_object_meta(
             account, account, container, name, 'pithos', version)
         if meta['checksum'] == '':
-            size, hashmap = backend.get_object_hashmap(
+            _, size, hashmap = backend.get_object_hashmap(
                 account, account, container, name, version)
             checksum = hashmap_md5(backend, hashmap, size)
             backend.update_object_checksum(

snf-pithos-app/pithos/api/management/commands/file-show.py

@@ -75,9 +75,8 @@ class Command(SynnefoCommand):
                     update_public_meta(public, kv)
 
             if options['hashmap']:
-                _, kv['hashmap'] = b.get_object_hashmap(account, account,
-                                                        container, name,
-                                                        options['obj_version'])
+                _, size, kv['hashmap'] = b.get_object_hashmap(
+                    account, account, container, name, options['obj_version'])
 
             utils.pprint_table(self.stdout, [kv.values()], kv.keys(),
                                options["output_format"], vertical=True)

snf-pithos-app/pithos/api/public.py

@@ -124,17 +124,17 @@ def public_read(request, v_public):
 
         try:
             for x in objects:
-                s, h = request.backend.get_object_hashmap(request.user_uniq,
-                                                          v_account,
-                                                          src_container,
-                                                          x[0], x[1])
+                _, s, h = request.backend.get_object_hashmap(request.user_uniq,
+                                                             v_account,
+                                                             src_container,
+                                                             x[0], x[1])
                 sizes.append(s)
                 hashmaps.append(h)
         except:
             raise faults.ItemNotFound('Object does not exist')
     else:
         try:
-            s, h = request.backend.get_object_hashmap(
+            _, s, h = request.backend.get_object_hashmap(
                 request.user_uniq, v_account,
                 v_container, v_object)
             sizes.append(s)