metrics fetch

aboudreault@kovaro:~/git/cstar/automaton$ ctool metrics test_cluster --fetch-osm --collect-interval=10
Traceback (most recent call last):
  File "/home/aboudreault/git/cstar/automaton/bin/ctool", line 16, in <module>
    run()
  File "/home/aboudreault/git/cstar/automaton/automaton/ctool.py", line 3524, in run
    sys.exit(cmd_obj.run())
  File "/home/aboudreault/git/cstar/automaton/automaton/ctool.py", line 2357, in run
    collect_interval, start, "now")
  File "/home/aboudreault/git/cstar/automaton/automaton/api/perf_monitoring.py", line 406, in export_legacy_ctool_os_metrics
    result_map = __convert_to_legacy_format(json_original_content, cluster)
  File "/home/aboudreault/git/cstar/automaton/automaton/api/perf_monitoring.py", line 354, in __convert_to_legacy_format
    if node_ip not in result_map:
UnboundLocalError: local variable 'node_ip' referenced before assignment