message: switch secret; always send to channel
diff: @@ -486,7 +486,7 @@ steps:
  image: plugins/slack
  settings:
  webhook:
  - from_secret: slack_webhook
  + from_secret: slack_webhook_nightly
  template:
  - |
  Nightly Test Run Status: *{{ uppercasefirst build.status }}*
  @@ -496,6 +496,7 @@ steps:
  when:
  status:
  - failure
  + - success
  depends_on:
  - nctl-nighly-script
  