message: Update grafana dashboard
  This solves Issue
diff: @@ -6,7 +6,7 @@ dashboard_list=[
  {
  'name': 'Single Geth',
  'filename': 'single_geth.json',
  - 'url': 'https://gist.githubusercontent.com/karalabe/1e26f9ea5c842fb118584edadc454e18/raw/6754e6d5c59328e19ad3a8a29a8e7e41fd46e202/geth.json'
  + 'url': 'https://grafana.com/api/dashboards/13877/revisions/1/download'
  }
  ]
  dashboard_path="/grafana-dashboards"
  