[mysql] fix tox.ini file for mysql versions in tests

Author: ufoot

tox.ini

@@ -14,6 +14,7 @@ envlist =
     {py27,py34}-flask{010,011}
     {py27,py34}-flask{010,011}-flaskcache{013}
     {py27}-flask{010,011}-flaskcache{012}
+    {py27,py34}-mysql-connector{12,20,21}
     {py27,py34}-pymongo{30,31,32,33}
     {py27,py34}-sqlalchemy{10,11}
     flake8
@@ -73,9 +74,9 @@ commands =
     {py27}-flask{010,011}-flaskcache{012}: nosetests {posargs} tests/contrib/flask_cache
     {py27,py34}-flask{010,011}: nosetests {posargs} tests/contrib/flask
     {py27,py34}-falcon{10}: nosetests {posargs} tests/contrib/falcon
+    {py27,py34}-mysql-connector{12,20,21}: nosetests {posargs} tests/contrib/mysql
     {py27,py34}-pymongo{30,31,32,33}: nosetests {posargs} tests/contrib/pymongo/ tests/contrib/mongoengine
     {py27,py34}-sqlalchemy{10,11}: nosetests {posargs} tests/contrib/sqlalchemy tests/contrib/psycopg tests/contrib/sqlite3
-    {py27,py34}-mysql-connector{12,20,21}: nosetests {posargs} tests/contrib/mysql
 
 [testenv:flake8]
 deps=flake8