Replace storage backend 'pillar' with 'local'

The backend 'pillar' is obsolete; 'local' is the modernity and uses our
nice storage API.

pillar/api/file_storage/__init__.py

@@ -363,7 +363,7 @@ def generate_link(backend, file_path: str, project_id: str=None, is_public=False
 
         return blob.get_url(is_public=is_public)
 
-    if backend == 'pillar':
+    if backend == 'pillar':  # obsolete, replace with local.
         return url_for('file_storage.index', file_name=file_path,
                        _external=True, _scheme=current_app.config['SCHEME'])
     if backend == 'cdnsun':

pillar/api/node_types/storage.py

@@ -16,7 +16,7 @@ node_type_storage = {
         'subdir': {
             'type': 'string',
         },
-        # Which backend is used to store the files (gcs, pillar, bam, cdnsun)
+        # Which backend is used to store the files (gcs, local)
         'backend': {
             'type': 'string',
         },

pillar/tests/common_test_data.py

@@ -38,7 +38,7 @@ EXAMPLE_FILE = {'_id': ObjectId('5672e2c1c379cf0007b31995'),
                 '_created': datetime.datetime(2015, 12, 17, 16, 28, 49, tzinfo=tz_util.utc),
                 'md5': '',
                 'file_path': 'c2a5c897769ce1ef0eb10f8fa1c472bcb8e2d5a4.png',
-                'backend': 'pillar',
+                'backend': 'local',
                 'link': 'http://localhost:8002/file',
                 'link_expires': datetime.datetime(2016, 3, 22, 9, 28, 22, tzinfo=tz_util.utc)}
 

tests/test_celery/test_file_link_tasks.py

@@ -33,7 +33,7 @@ EXAMPLE_FILE = {
     'user': ObjectId('56264fc4fa3a250344bd10c5'),
     'content_type': 'image/png',
     'file_path': 'c2a5c897769ce1ef0eb10f8fa1c472bcb8e2d5a4.png',
-    'backend': 'pillar',
+    'backend': 'local',
     'link': 'http://localhost:8002/file',
 }
 
@@ -58,7 +58,7 @@ class FileLinkCeleryTasksTest(AbstractPillarTest):
             'link_expires': now + datetime.timedelta(hours=1, minutes=57)})
         # Not same backend → ignore
         fid4, file_4 = self.ensure_file_exists({
-            'backend': 'pillar',
+            'backend': 'local',
             'link_expires': now + datetime.timedelta(hours=1, minutes=58)})
         # Same as fid3 → refresh
         fid5, _ = self.ensure_file_exists({