message: Change to use Python2.7 for gcloud auth command
diff: @@ -21,7 +21,7 @@ install:
  - export PATH=$PATH:$HOME/google-cloud-sdk/bin
  - export CLOUDSDK_CORE_DISABLE_PROMPTS=1
  - export GOOGLE_CREDENTIALS=$(cat gcp-credentials.json)
  - - gcloud auth activate-service-account --key-file gcp-credentials.json
  + - CLOUDSDK_PYTHON=/usr/bin/python gcloud auth activate-service-account --key-file gcp-credentials.json
  - curl -o- -L https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get | bash
  - helm init -c
  - helm repo add bitnami https://charts.bitnami.com/bitnami
  