playground: Update uses of the xrpc library to use the new v23.WithNew*Server API.

Change-Id: I007665eff6b2f3cc80a895993bf67dcc25ea4b0b
diff --git a/go/src/v.io/x/playground/bundles/fortune/src/server/server.go b/go/src/v.io/x/playground/bundles/fortune/src/server/server.go
index d7f1579..7024e30 100644
--- a/go/src/v.io/x/playground/bundles/fortune/src/server/server.go
+++ b/go/src/v.io/x/playground/bundles/fortune/src/server/server.go
@@ -17,7 +17,6 @@
 	"v.io/x/lib/vlog"
 	"v.io/x/ref/lib/security/securityflag"
 	"v.io/x/ref/lib/signals"
-	"v.io/x/ref/lib/xrpc"
 	_ "v.io/x/ref/runtime/factories/generic"
 
 	"fortune"
@@ -67,7 +66,7 @@
 	fortuneServer := fortune.FortuneServer(newFortuned())
 
 	// Create a new instance of the runtime's server functionality.
-	server, err := xrpc.NewServer(ctx, "bakery/cookie/fortune", fortuneServer, securityflag.NewAuthorizerOrDie())
+	ctx, server, err := v23.WithNewServer(ctx, "bakery/cookie/fortune", fortuneServer, securityflag.NewAuthorizerOrDie())
 	if err != nil {
 		vlog.Panic("failure creating server: ", err)
 	}
diff --git a/go/src/v.io/x/playground/testdata/src/pong/pong.go b/go/src/v.io/x/playground/testdata/src/pong/pong.go
index d09a2b5..60bd5d9 100644
--- a/go/src/v.io/x/playground/testdata/src/pong/pong.go
+++ b/go/src/v.io/x/playground/testdata/src/pong/pong.go
@@ -15,7 +15,6 @@
 	"v.io/v23/security"
 	"v.io/x/lib/vlog"
 	"v.io/x/ref/lib/signals"
-	"v.io/x/ref/lib/xrpc"
 	_ "v.io/x/ref/runtime/factories/generic"
 
 	"pingpong"
@@ -34,7 +33,7 @@
 	defer shutdown()
 
 	serverPong := pingpong.PingPongServer(&pongd{})
-	s, err := xrpc.NewServer(ctx, "pingpong", serverPong, nil)
+	ctx, s, err := v23.WithNewServer(ctx, "pingpong", serverPong, nil)
 	if err != nil {
 		vlog.Fatal("failure creating server: ", err)
 	}