marvin: install mysql-connector-python >= 8.4.0 (#13482)

Author: weizhouapache

tools/marvin/setup.py

@@ -46,7 +46,7 @@
                 "marvin.sandbox.basic"],
       license="LICENSE.txt",
       install_requires=[
-          "mysql-connector-python <= 8.4.0",
+          "mysql-connector-python >= 8.4.0",
           "requests >= 2.2.1",
           "paramiko >= 1.13.0",
           "nose >= 1.3.3",