Vendor update for aws sdk

Updated to latest version of go aws sdk.
Use vendored sub pakages within aws sdk.
Adds missing vendor packages for letsencrypt

Fixes #1832

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

vendor/github.com/aws/aws-sdk-go/service/s3/waiters.go

@@ -18,6 +18,12 @@ func (c *S3) WaitUntilBucketExists(input *HeadBucketInput) error {
 				Argument: "",
 				Expected: 200,
 			},
+			{
+				State:    "success",
+				Matcher:  "status",
+				Argument: "",
+				Expected: 301,
+			},
 			{
 				State:    "success",
 				Matcher:  "status",