Set auth request schema to zero in req header

Author: denis-ignatenko

tarantool/request.py

@@ -134,6 +134,16 @@ def sha1(values):
         request_body = msgpack.dumps({IPROTO_USER_NAME: user,
                                       IPROTO_TUPLE: ("chap-sha1", scramble)})
         self._body = request_body
+    
+    def header(self, length):
+        self._sync = self.conn.generate_sync()
+        # Set IPROTO_SCHEMA_ID: 0 to avoid SchemaReloadException
+        # It is ok to use 0 in auth every time
+        header = msgpack.dumps({IPROTO_CODE: self.request_type,
+                                IPROTO_SYNC: self._sync,
+                                IPROTO_SCHEMA_ID: 0})
+
+        return msgpack.dumps(length + len(header)) + header
 
     def header(self, length):
         self._sync = self.conn.generate_sync()