message: [management] Prevent from sending no change validator configs
  Closes:
diff: @@ -24,9 +24,17 @@ pub struct SetValidatorConfig {
  json_server: Option<String>,
  #[structopt(flatten)]
  validator_config: libra_management::validator_config::ValidatorConfig,
  - #[structopt(long, help = "Validator Network Address")]
  + #[structopt(
  + long,
  + required_unless = "fullnode-address",
  + help = "Validator Network Address"
  + )]
  validator_address: Option<NetworkAddress>,
  - #[structopt(long, help = "Full Node Network Address")]
  + #[structopt(
  + long,
  + required_unless = "validator-address",
  + help = "Full Node Network Address"
  + )]
  fullnode_address: Option<NetworkAddress>,
  }
  