Toxiproxy manager change

* Use `Guid.NewGuid` to ensure unique name
* No need to delete first as names should be unique

Author: lukebakken

projects/Test/Integration/ToxiproxyManager.cs

@@ -34,11 +34,6 @@ public ToxiproxyManager(string testDisplayName, bool isRunningInCI, bool isWindo
 
             _proxyPort = Interlocked.Increment(ref s_proxyPort);
 
-            /*
-            string now = DateTime.UtcNow.ToString("o", System.Globalization.CultureInfo.InvariantCulture);
-            Console.WriteLine("{0} [DEBUG] {1} _proxyPort {2}", now, testDisplayName, _proxyPort);
-            */
-
             _proxyConnection = new Connection(resetAllToxicsAndProxiesOnClose: true);
             _proxyClient = _proxyConnection.Client();
 
@@ -70,17 +65,9 @@ public ToxiproxyManager(string testDisplayName, bool isRunningInCI, bool isWindo
 
         public async Task InitializeAsync()
         {
-            string proxyName = $"{ProxyNamePrefix}-{_testDisplayName}-{Util.Now}-{Util.GenerateShortUuid()}";
+            string proxyName = $"{ProxyNamePrefix}-{_testDisplayName}-{Util.Now}-{Guid.NewGuid()}";
             _proxy.Name = proxyName;
 
-            try
-            {
-                await _proxyClient.DeleteAsync(_proxy);
-            }
-            catch
-            {
-            }
-
             ushort retryCount = 5;
             do
             {