Add ability to switch database driver

Also added mysqlconnector packages into default installation.

blueprint enable-mysql-connector

Change-Id: Ib2cda7cb183dc8f0ff4759cc6e9ecab469fd121c
diff --git a/files/rpms-suse/nova b/files/rpms-suse/nova
index 7a1160e..2a210e5 100644
--- a/files/rpms-suse/nova
+++ b/files/rpms-suse/nova
@@ -35,6 +35,7 @@
 python-lxml # needed for glance which is needed for nova --- this shouldn't be here
 python-mox
 python-mysql
+python-mysql.connector
 python-numpy # needed by websockify for spice console
 python-paramiko
 python-sqlalchemy-migrate