test: improve domain-top-level-error-handler-throw

Use assert.strictEqual instead of assert.equal. PR-URL: #9950 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Rich Trott <[email protected]>

Author: codeVana

test/parallel/test-domain-top-level-error-handler-throw.js

@@ -48,8 +48,8 @@ if (process.argv[2] === 'child'){
 varexpectedExitCode=7;
 varexpectedSignal=null;
 
-assert.equal(exitCode,expectedExitCode);
-assert.equal(signal,expectedSignal);
+assert.strictEqual(exitCode,expectedExitCode);
+assert.strictEqual(signal,expectedSignal);
 });
 }
 }