use cache locks

feeds/migrations/0007_remove_feed_lock.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.1.5 on 2019-11-24 14:07
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('feeds', '0006_tapasfeedmoduleconfig'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='feed',
+            name='lock',
+        ),
+    ]