DeltaClient::getSecretMetadata response mismatched with javadoc

[numbat]

The response should be aGetSecretMetadataResponse object (this is relevant for the callee if they need to update the metadata and need the version number). From the code:

    /**
     * Gets the metadata key and value pairs for the given secret.
     *
     * @param identityId the authenticating identity id
     * @param secretId the secret id
     * @return a map of metadata key and value pairs for the secret
     * @throws DeltaServiceException upon exception
     */
    public GetSecretMetadataResponse getSecretMetadata(String identityId, String secretId)
            throws DeltaServiceException {
        return apiClient.getSecretMetadata(new SecretRequest(identityId, secretId));
    }