test: use dynamic port in test-tls-connect.js

Change common.PORT to dynamic port to prevent collision
with other parallel test which use common.PORT

Refs: [nodejs#12376](nodejs#12376)

Author: oantoro

test/parallel/test-tls-connect.js

@@ -35,7 +35,7 @@ const path = require('path');
   const cert = fs.readFileSync(path.join(common.fixturesDir, 'test_cert.pem'));
   const key = fs.readFileSync(path.join(common.fixturesDir, 'test_key.pem'));
 
-  const options = { cert: cert, key: key, port: common.PORT };
+  const options = { cert: cert, key: key, port: 0 };
   const conn = tls.connect(options, common.mustNotCall());
 
   conn.on('error', common.mustCall());
@@ -49,7 +49,7 @@ const path = require('path');
   const conn = tls.connect({
     cert: cert,
     key: key,
-    port: common.PORT,
+    port: 0,
     ciphers: 'rick-128-roll'
   }, common.mustNotCall());