Add SecretsManager smoke integration tests (#180)

Adds integration smoke tests for SecretsManager service.

V2 port of: aws/aws-sdk-go#1948

Author: jasdel

internal/awstesting/integration/smoke/secretsmanager/client.go

@@ -0,0 +1,17 @@
+// +build integration
+
+//Package secretsmanager provides gucumber integration tests support.
+package secretsmanager
+
+import (
+	"github.com/aws/aws-sdk-go-v2/internal/awstesting/integration"
+	_ "github.com/aws/aws-sdk-go-v2/internal/awstesting/integration/smoke"
+	"github.com/aws/aws-sdk-go-v2/service/secretsmanager"
+	"github.com/gucumber/gucumber"
+)
+
+func init() {
+	gucumber.Before("@secretsmanager", func() {
+		gucumber.World["client"] = secretsmanager.New(integration.Config())
+	})
+}

internal/awstesting/integration/smoke/secretsmanager/secretsmanager.feature

@@ -0,0 +1,13 @@
+# language: en
+@smoke @secretsmanager
+Feature: Amazon SecretsManager
+
+  Scenario: Making a request
+    When I call the "ListSecrets" API
+    Then the request should be successful
+
+  Scenario: Handling errors
+    When I attempt to call the "DescribeSecret" API with:
+      | SecretId | fake-secret-id |
+    Then I expect the response error code to be "ResourceNotFoundException"
+