preupg: rule "CGROUP_DAEMON in sysconfig scripts" reports "error" status

Issue

• Executing preupg on the RHEL 6 system, rule "CGROUP_DAEMON in sysconfig scripts" reports error

  # preupg --skip-common --select-rules=xccdf_preupg_rule_system_SysconfigCgroupDaemon_check
  [...]
  Result table with checks and their results for 'main contents':
  --------------------------------------------------
  |CGROUP_DAEMON in sysconfig scripts      |error  |
  --------------------------------------------------
  [...]
  

• HTML report shows the following Log for the rule "CGROUP_DAEMON in sysconfig scripts"

  Traceback (most recent call last):
    File "/root/preupgrade/RHEL6_7/system/SysconfigCgroupDaemon/check", line 72, in <module>
      if cgroup_daemon():
    File "/root/preupgrade/RHEL6_7/system/SysconfigCgroupDaemon/check", line 62, in cgroup_daemon
      with open(root+"/"+filename, "r") as f:
  IOError: [Errno 2] No such file or directory: '/etc/sysconfig/<SOMEFILE>'