change test data to a non-synthetic use case

Signed-off-by: david kydd <david.kydd@microsoft.com>

Author: davidkydd

config/testdata/tls_config.next_protos.good.json

@@ -1 +1 @@
-{"next_protos": ["testproto1", "testproto2"]}
+{"next_protos": ["h2", "http/1.1"]}

config/testdata/tls_config.next_protos.good.yml

@@ -1 +1 @@
-next_protos: ["testproto1", "testproto2"]
+next_protos: ["h2", "http/1.1"]

config/tls_config_test.go

@@ -65,7 +65,7 @@ var expectedTLSConfigs = []struct {
 	},
 	{
 		filename: "tls_config.next_protos.good.json",
-		config:   &tls.Config{NextProtos: []string{"testproto1", "testproto2"}},
+		config:   &tls.Config{NextProtos: []string{"h2", "http/1.1"}},
 	},
 	{
 		filename: "tls_config.tlsversion.good.json",
@@ -85,7 +85,7 @@ var expectedTLSConfigs = []struct {
 	},
 	{
 		filename: "tls_config.next_protos.good.yml",
-		config:   &tls.Config{NextProtos: []string{"testproto1", "testproto2"}},
+		config:   &tls.Config{NextProtos: []string{"h2", "http/1.1"}},
 	},
 	{
 		filename: "tls_config.tlsversion.good.yml",