Make alembic use mysqlclient insted of mysqlconnector

Author: varesa

alembic.ini

@@ -22,7 +22,7 @@ script_location = alembic
 
 #sqlalchemy.url = driver://user:pass@localhost/dbname
 #sqlalchemy.url = sqlite:///%(here)s/tilaushallinta.sqlite
-sqlalchemy.url = mysql+mysqlconnector://<user>:<password>@<host>:<port>/<schema>
+sqlalchemy.url = mysql+mysqldb://<user>:<password>@<host>:<port>/<schema>
 
 
 # Logging configuration