CC-2797: Files in /etc/airtime should not be world readable

-fixed

utils/airtime-update-db-settings.py

@@ -5,10 +5,15 @@ we need to update database host, dbname, username and password.
 This script reads from airtime.conf.
 """
 import os
+import sys
 import ConfigParser
 import xml.dom.minidom
 from xml.dom.minidom import Node
 
+if not os.geteuid() == 0:
+    sys.exit('Must be root user.')
+
+
 #Read the universal values
 parser = ConfigParser.SafeConfigParser()
 parser.read('/etc/airtime/airtime.conf')