Merge branch '8-vault-jwt-authentication-not-working' into 'master'

Resolve "Vault JWT authentication not working"

Closes #8

See merge request to-be-continuous/gcloud!15

templates/gitlab-ci-gcloud-vault.yml

 # =====================================================================================================================
 # === Vault template variant
 # =====================================================================================================================
-variables:
-  # variables have to be explicitly declared in the YAML to be exported to the service
-  VAULT_ROLE_ID: "$VAULT_ROLE_ID"
-  VAULT_SECRET_ID: "$VAULT_SECRET_ID"
 
 .gcp-base:
   services: