Update go-retryablehttp de

vendor/github.com/hashicorp/go-retryablehttp/client.go

@@ -221,8 +221,11 @@ func LinearJitterBackoff(min, max time.Duration, attemptNum int, resp *http.Resp
 
 	// Pick a random number that lies somewhere between the min and max and
 	// multiply by the attemptNum. attemptNum starts at zero so we always
-	// increment here.
-	return time.Duration((rand.Int63() % int64(max-min)) * int64(attemptNum))
+	// increment here. We first get a random percentage, then apply that to the
+	// difference between min and max, and add to min.
+	jitter := rand.Float64() * float64(max-min)
+	jitterMin := int64(jitter) + int64(min)
+	return time.Duration(jitterMin * int64(attemptNum))
 }
 
 // PassthroughErrorHandler is an ErrorHandler that directly passes through the

vendor/vendor.json

@@ -1141,10 +1141,10 @@
 			"revisionTime": "2018-03-31T00:25:53Z"
 		},
 		{
-			"checksumSHA1": "3iOEPoU3QvetU5xPFTg+Oqsl+WU=",
+			"checksumSHA1": "QIiwrGGMyvIiBU6zcQlGKlA5V/c=",
 			"path": "github.com/hashicorp/go-retryablehttp",
-			"revision": "7d12bb7d610c15e57fbbe304084a87fe87574591",
-			"revisionTime": "2018-05-10T00:52:31Z"
+			"revision": "fac0f38bc25d8ef70e3c8d95c911d6062b6a94ec",
+			"revisionTime": "2018-05-18T19:11:07Z"
 		},
 		{
 			"checksumSHA1": "A1PcINvF3UiwHRKn8UcgARgvGRs=",