- CLOUDSTACK-3229: Removes String format method call that is not
  supported in Python 2.4
CLOUDSTACK-3042: handle System VM Scaling up of memory/CPU based on the presence of tools in the template
Signed off by : Nitin Mehta<nitin.mehta@citrix.com>
- CLOUDSTACK-3229: Fixes a syntax error in s3xen
- CLOUDSTACK-3229: Fixes string formatting argument mismatch
- CLOUDSTACK-3229: Attempt to adjust snapshot source path to new cache
  filesystem layout