Merge pull request #16693 from AspirinSJL/use_different_port

Use unique port in php test

src/php/tests/unit_tests/ChannelTest.php

@@ -599,10 +599,10 @@ class ChannelTest extends PHPUnit_Framework_TestCase
     public function testPersistentChannelForceNewOldChannelIdle2()
     {
 
-        $this->channel1 = new Grpc\Channel('localhost:50029', [
+        $this->channel1 = new Grpc\Channel('localhost:50032', [
             "grpc_target_persist_bound" => 2,
         ]);
-        $this->channel2 = new Grpc\Channel('localhost:50029', []);
+        $this->channel2 = new Grpc\Channel('localhost:50032', []);
 
         // try to connect on channel2
         $state = $this->channel1->getConnectivityState(true);