Fix python reference

Author: spark404

packaging/centos7/replace.properties

@@ -49,7 +49,7 @@ MSUSER=cloud
 PIDDIR=/var/run
 PLUGINJAVADIR=/usr/share/cloudstack-management/plugin
 PREMIUMJAVADIR=/usr/share/cloudstack-management/premium
-PYTHONDIR=/usr/lib/python2.6/site-packages/
+PYTHONDIR=/usr/lib/python2.7/site-packages/
 SERVERSYSCONFDIR=/etc/sysconfig
 SETUPDATADIR=/usr/share/cloudstack-management/setup
 SYSCONFDIR=/etc/sysconfig