Removed old versioning system

server/extension/sql/10_redis_helper.sql

@@ -0,0 +1,18 @@
+-- Get the connection to redis from cache or create a new one
+CREATE OR REPLACE FUNCTION cdb_dataservices_server._connect_to_redis(user_id text)
+RETURNS boolean AS $$
+  cache_key = "redis_connection_{0}".format(user_id)
+  if cache_key in GD:
+    return False
+  else:
+    from cartodb_services.tools import RedisConnection, RedisDBConfig
+    metadata_config = RedisDBConfig('redis_metadata_config', plpy)
+    metrics_config = RedisDBConfig('redis_metrics_config', plpy)
+    redis_metadata_connection = RedisConnection(metadata_config).redis_connection()
+    redis_metrics_connection = RedisConnection(metrics_config).redis_connection()
+    GD[cache_key] = {
+      'redis_metadata_connection': redis_metadata_connection,
+      'redis_metrics_connection': redis_metrics_connection,
+    }
+    return True
+$$ LANGUAGE plpythonu SECURITY DEFINER;