Fix local testnet scripts (#2229)

## Issue Addressed

Resolves #2094 

## Proposed Changes

Fixes scripts for creating local testnets. Adds an option in `lighthouse boot_node` to run with a previously generated enr.

lcli/src/deploy_deposit_contract.rs

@@ -0,0 +1,33 @@
+use clap::ArgMatches;
+use environment::Environment;
+use types::EthSpec;
+
+use web3::{transports::Http, Web3};
+
+pub fn run<T: EthSpec>(env: Environment<T>, matches: &ArgMatches<'_>) -> Result<(), String> {
+    let eth1_http: String = clap_utils::parse_required(matches, "eth1-http")?;
+    let confirmations: usize = clap_utils::parse_required(matches, "confirmations")?;
+    let validator_count: Option<usize> = clap_utils::parse_optional(matches, "validator-count")?;
+
+    let transport =
+        Http::new(&eth1_http).map_err(|e| format!("Unable to connect to eth1 HTTP: {:?}", e))?;
+    let web3 = Web3::new(transport);
+
+    env.runtime().block_on(async {
+        let contract = eth1_test_rig::DepositContract::deploy(web3, confirmations, None)
+            .await
+            .map_err(|e| format!("Failed to deploy deposit contract: {:?}", e))?;
+
+        println!("Deposit contract address: {:?}", contract.address());
+
+        // Deposit insecure validators to the deposit contract created
+        if let Some(validator_count) = validator_count {
+            let amount = env.eth2_config.spec.max_effective_balance;
+            for i in 0..validator_count {
+                println!("Submitting deposit for validator {}...", i);
+                contract.deposit_deterministic_async::<T>(i, amount).await?;
+            }
+        }
+        Ok(())
+    })
+}