trustee-attester: attest before get-resource

Without it rcar_client complains:
    Authenticating with KBS failed. Perform a new RCAR handshake

No need to keep _token as the kbs_protocol client keeps it.

Signed-off-by: Uri Lublin <[email protected]>

attestation-agent/kbs_protocol/src/bin/trustee-attester/main.rs

@@ -80,6 +80,7 @@ async fn main() -> Result<()> {
                 true => path,
             };
             let resource = ResourceUri::new("", &resource_path)?;
+            let (_token, _key) = client.get_token().await?; // attest first
             let resource_bytes = client.get_resource(resource).await?;
 
             println!("{}", STANDARD.encode(resource_bytes));