In order to run these tests you first need to export the following environment variables
MTR_VAULT_ADDRESS=http://127.0.0.1:8200
MTR_VAULT_ADMIN_TOKEN=<admin_token>
MTR_VAULT_PLUGIN_TOKEN=<plugin_token>
MTR_VAULT_VERSION=1|2

In addition, when 'MTR_VAULT_ADDRESS' is 'https://', 'MTR_VAULT_CA' can also be defined.
MTR_VAULT_CA=/path/ca/certificate.pem
