undercloud deployment fails during os-refresh-config

Issue

• During undercloud deploy, the command errors out returning non-zero exit status
• os-refresh-config returns error status

• Rerunning the same deployment command completes successfully

  (os-refresh-config) [ERROR] during configure phase. [Command '['dib-run-parts', '/usr/libexec/os-refresh-config/configure.d']' returned non-zero exit status 6]
  (os-refresh-config) [ERROR] Aborting...
  Traceback (most recent call last):
   File "<string>", line 1, in <module>
   File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 815, in install
     _run_orc(instack_env)
   File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 699, in _run_orc
     _run_live_command(args, instack_env, 'os-refresh-config')
   File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 370, in _run_live_command
     raise RuntimeError('%s failed. See log for details.' % name)
  RuntimeError: os-refresh-config failed. See log for details.
  Command 'instack-install-undercloud' returned non-zero exit status 1