message: fix(message-relayer): use prom-compliant metric name
diff: @@ -57,10 +57,8 @@ const optionSettings = {
  }
  export class MessageRelayerService extends BaseService<MessageRelayerOptions> {
  - protected name = 'Message Relayer'
  -
  constructor(options: MessageRelayerOptions) {
  - super('Message Relayer', options, optionSettings)
  + super('Message_Relayer', options, optionSettings)
  }
  protected spreadsheetMode: boolean
  