Switch to using the dep tool and update all the dependencies

vendor/github.com/aws/aws-sdk-go/awstesting/integration/smoke/iam/client.go

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+// +build integration
+
+//Package iam provides gucumber integration tests support.
+package iam
+
+import (
+	"github.com/aws/aws-sdk-go/awstesting/integration/smoke"
+	"github.com/aws/aws-sdk-go/service/iam"
+	"github.com/gucumber/gucumber"
+)
+
+func init() {
+	gucumber.Before("@iam", func() {
+		gucumber.World["client"] = iam.New(smoke.Session)
+	})
+}

vendor/github.com/aws/aws-sdk-go/awstesting/integration/smoke/iam/iam.feature

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+# language: en
+@iam @client
+Feature: AWS Identity and Access Management
+
+  Scenario: Making a request
+    When I call the "ListUsers" API
+    Then the value at "Users" should be a list
+
+  Scenario: Handling errors
+    When I attempt to call the "GetUser" API with:
+    | UserName | fake_user |
+    Then I expect the response error code to be "NoSuchEntity"
+    And I expect the response error message to include:
+    """
+    The user with name fake_user cannot be found.
+    """