Accept staking token as an env arg in tests

This is required for the validator set update tests to run properly on
downstream chains.

orchestrator/test_runner/src/happy_path.rs

@@ -5,6 +5,7 @@ use crate::ADDRESS_PREFIX;
 use crate::CHAIN_BINARY;
 use crate::MINER_ADDRESS;
 use crate::MINER_PRIVATE_KEY;
+use crate::STAKING_TOKEN;
 use crate::STARTING_STAKE_PER_VALIDATOR;
 use crate::TOTAL_TIMEOUT;
 use clarity::PrivateKey as EthPrivateKey;
@@ -202,7 +203,11 @@ pub async fn test_valset_update(web30: &Web3, keys: &[ValidatorKeys], gravity_ad
         .to_address(&format!("{}valoper", *ADDRESS_PREFIX))
         .unwrap()
         .to_string();
-    let amount = &format!("{}stake", STARTING_STAKE_PER_VALIDATOR / 4);
+    let amount = &format!(
+        "{}{}",
+        STARTING_STAKE_PER_VALIDATOR / 4,
+        STAKING_TOKEN.as_str()
+    );
     info!(
         "Delegating {} to {} in order to generate a validator set update",
         amount, delegate_address

orchestrator/test_runner/src/main.rs

@@ -49,6 +49,8 @@ lazy_static! {
         env::var("CHAIN_BINARY").unwrap_or_else(|_| "gravity".to_owned());
     static ref ADDRESS_PREFIX: String =
         env::var("ADDRESS_PREFIX").unwrap_or_else(|_| CosmosAddress::DEFAULT_PREFIX.to_owned());
+    static ref STAKING_TOKEN: String =
+        env::var("STAKING_TOKEN").unwrap_or_else(|_| "stake".to_owned());
     static ref COSMOS_NODE_GRPC: String =
         env::var("COSMOS_NODE_GRPC").unwrap_or_else(|_| "http://localhost:9090".to_owned());
     static ref COSMOS_NODE_ABCI: String =