Update lambda service testdata

Copied from test data from github.com/aws/aws-sdk-go commit 67f532fc99ebc262a50fa05500b3462065b75569

Author: a-hilaly

pkg/generate/lambda_test.go

@@ -58,15 +58,18 @@ func TestLambda_Function(t *testing.T) {
 
 	expSpecFieldCamel := []string{
 		"Code",
+		"CodeSigningConfigARN",
 		"DeadLetterConfig",
 		"Description",
 		"Environment",
 		"FileSystemConfigs",
 		"FunctionName",
 		"Handler",
+		"ImageConfig",
 		"KMSKeyARN",
 		"Layers",
 		"MemorySize",
+		"PackageType",
 		"Publish",
 		"Role",
 		"Runtime",
@@ -84,12 +87,15 @@ func TestLambda_Function(t *testing.T) {
 		"CodeSHA256",
 		"CodeSize",
 		// "FunctionArn", <-- ACKMetadata.ARN
+		"ImageConfigResponse",
 		"LastModified",
 		"LastUpdateStatus",
 		"LastUpdateStatusReason",
 		"LastUpdateStatusReasonCode",
 		"MasterARN",
 		"RevisionID",
+		"SigningJobARN",
+		"SigningProfileVersionARN",
 		"State",
 		"StateReason",
 		"StateReasonCode",