valset: mark "active" validators in ValidatorInfo

[alpe]

When the ValidatorInfo returns a bool value when in the active set then I can set the right status value for GRPC queries without doing a second query on the active set.

Relates to confio/tgrade#124

[uint]

@alpe As far as I understand this, ValidatorInfo is only provided in ListActiveValidatorsResponse, which returns only active validators anyway.

Did you mean adding the bool to OperatorResponse in ListValidatorResponse?

#[derive(Serialize, Deserialize, Clone, PartialEq, JsonSchema, Debug)]
pub struct ListValidatorResponse {
    pub validators: Vec<OperatorResponse>,
}

#[derive(Serialize, Deserialize, Clone, PartialEq, JsonSchema, Debug)]
pub struct ListActiveValidatorsResponse {
    pub validators: Vec<ValidatorInfo>,
}

[alpe]

yes, please add to OperatorResponse.