message: add gcloud auth commands to mainnet deploy job
diff: @@ -265,6 +265,9 @@ jobs:
  equal: [ master, master ]
  steps:
  - run: |
  + echo ${GCLOUD_SERVICE_KEY} > gcloud-service-key.json
  + gcloud auth activate-service-account --key-file=gcloud-service-key.json
  + gcloud config set project ${GOOGLE_PROJECT_ID}
  gcloud container clusters get-credentials mainnet --region us-central1-a --project ${GOOGLE_PROJECT_ID}
  export MACAROON=$(kubectl exec lnd-container-0 -- base64 /root/.lnd/data/chain/bitcoin/mainnet/admin.macaroon | tr -d '\n\r')
  export TLS=$(kubectl exec lnd-container-0 -- base64 /root/.lnd/tls.cert | tr -d '\n\r')
  