Percona Keyring Vault Component
-------------------------------

In order to run 'keyring_vault' MTR test suite the following environment
variables must be defined:

MTR_VAULT_VERSION=<vault_version> \
MTR_VAULT_ADDRESS=<vault_url> \
MTR_VAULT_CA=<ca_path> \
MTR_VAULT_ADMIN_TOKEN=<admin_token> \
MTR_VAULT_PLUGIN_TOKEN=<plugin_token> \
./mysql-test/mtr ... --suite=keyring_vault

'<vault_version>' - the version of the secret engine used in Vault Server
                    mount points: '1' for 'kv', '2' for 'kv-v2' (please
                    notice that Vault Server version <= 0.9.6 does not support
                   'kv-v2')
'<vault_url>'     - Vault Server Endpoint URL, will be translated into
                   'vault_url' parameter in the component configuration file,
                    e.g. 'https://127.0.0.1:8200'
                    (the protocol part must be 'https://' if 'MTR_VAULT_CA'
                    is set)
'<ca_path>'       - path to the CA certificate file in PEM format, will be
                    translated into 'vault_ca' parameter in the component
                    configuration file (please notice that 'MTR_VAULT_CA'
                    is optional)
'<admin_token>'   - Vault Server token with elevated privileges that will be
                    used to create temporary mount points
'<plugin_token>'  - Vault Server token that will be used to run the tests,
                    will be translated into 'token' parameter in the component
                    configuration file
