Replace minio-go with aws-sdk-go for s3-compatible log backend (#670)

* Logs should support specifying region when using S3-compatible object store

* Use aws-sdk-go client for s3 backed logstore

* fixes vendor with aws-sdk-go dependencies

vendor/github.com/aws/aws-sdk-go/service/codebuild/examples_test.go

@@ -0,0 +1,58 @@
+// Code generated by private/model/cli/gen-api/main.go. DO NOT EDIT.
+
+package codebuild_test
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/codebuild"
+)
+
+var _ time.Duration
+var _ strings.Reader
+var _ aws.Config
+
+func parseTime(layout, value string) *time.Time {
+	t, err := time.Parse(layout, value)
+	if err != nil {
+		panic(err)
+	}
+	return &t
+}
+
+// To get information about builds
+//
+// The following example gets information about builds with the specified build IDs.
+func ExampleCodeBuild_BatchGetBuilds_shared00() {
+	svc := codebuild.New(session.New())
+	input := &codebuild.BatchGetBuildsInput{
+		Ids: []*string{
+			aws.String("codebuild-demo-project:9b0ac37f-d19e-4254-9079-f47e9a389eEX"),
+			aws.String("codebuild-demo-project:b79a46f7-1473-4636-a23f-da9c45c208EX"),
+		},
+	}
+
+	result, err := svc.BatchGetBuilds(input)
+	if err != nil {
+		if aerr, ok := err.(awserr.Error); ok {
+			switch aerr.Code() {
+			case codebuild.ErrCodeInvalidInputException:
+				fmt.Println(codebuild.ErrCodeInvalidInputException, aerr.Error())
+			default:
+				fmt.Println(aerr.Error())
+			}
+		} else {
+			// Print the error, cast err to awserr.Error to get the Code and
+			// Message from an error.
+			fmt.Println(err.Error())
+		}
+		return
+	}
+
+	fmt.Println(result)
+}