Description of problem:
In openstack Liberty QoS feature was introduce to neutron.
It doesn't work with MySQL-python-1.2.3
as Ihar Hrachyshka <ihrachys> said all the upstream project of 
openstack tested against pymysql so packstack should use it as the default db driver


Version-Release number of selected component (if applicable):

How reproducible:
1. install openstack with packstack on centos7
2. configure neutron QoS with openstack
3. neutron qos-policy-create test 
4. neutron qos-policy-show test


Actual results:
Error in neutron server
manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 3") 'SELECT qos_policies.tenant_id AS qos_policies_tenant_id, qos_policies.id AS qos_policies_id, qos_policies.name AS qos_policies_name, qos_policies.description AS qos_policies_description, qos_policies.shared AS qos_policies_shared \nFROM qos_policies \nWHERE qos_policies.name = %s' ([u'test'],)


Additional info: