"default" used as a group name in cgroups is no longer an option

Issue

• We use 'default' as a groupname in cgconfig.conf and cgrules.conf.

• In RHEL6.5, this causes the cgconfig service to fail on startup with the following error message:

  Starting cgconfig service: error at line number 30 at default:syntax error
  

• On previous versions of RHEL6 this was no issue.

• Changing default to something else, fixes the problem.
• This is a change in behaviour from RHEL6.4 and earlier to RHEL6.5.