test: use common.crashOnUnhandledRejection

PR-URL: #17218
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: esbb48

test/parallel/test-http-agent.js

@@ -23,6 +23,7 @@
 const common = require('../common');
 const assert = require('assert');
 const http = require('http');
+common.crashOnUnhandledRejection();
 
 const N = 4;
 const M = 4;