Update AWS SDK to latest

Update to the latest AWS SDK to pick up EC2 Instance Metadata Service v2
support, announced in Nov 19, 2019.  Updating it here is necessary for
downstream projects that haven't adopted go mod (e.g. Nomad), and rely
on vendored provider packages here.

For more info on IMDSv2:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
.

go.mod

@@ -5,11 +5,12 @@ require (
 	github.com/Azure/azure-sdk-for-go v16.0.0+incompatible
 	github.com/Azure/go-autorest v10.7.0+incompatible
 	github.com/abdullin/seq v0.0.0-20160510034733-d5467c17e7af // indirect
-	github.com/aws/aws-sdk-go v1.15.24
+	github.com/aws/aws-sdk-go v1.15.41
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/denverdino/aliyungo v0.0.0-20170926055100-d3308649c661
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
 	github.com/digitalocean/godo v1.1.1
+	github.com/dimchansky/utfbom v1.1.0 // indirect
 	github.com/dnaeon/go-vcr v1.0.1 // indirect
 	github.com/fsnotify/fsnotify v1.4.7 // indirect
 	github.com/ghodss/yaml v1.0.0 // indirect

go.sum

@@ -8,6 +8,8 @@ github.com/abdullin/seq v0.0.0-20160510034733-d5467c17e7af h1:DBNMBMuMiWYu0b+8KM
 github.com/abdullin/seq v0.0.0-20160510034733-d5467c17e7af/go.mod h1:5Jv4cbFiHJMsVxt52+i0Ha45fjshj6wxYr1r19tB9bw=
 github.com/aws/aws-sdk-go v1.15.24 h1:xLAdTA/ore6xdPAljzZRed7IGqQgC+nY+ERS5vaj4Ro=
 github.com/aws/aws-sdk-go v1.15.24/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
+github.com/aws/aws-sdk-go v1.15.41 h1:dr+Z+19rMrA2vLXfIaW904m2SCMchoAof5l+pqtHSH8=
+github.com/aws/aws-sdk-go v1.15.41/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/denverdino/aliyungo v0.0.0-20170926055100-d3308649c661 h1:lrWnAyy/F72MbxIxFUzKmcMCdt9Oi8RzpAxzTNQHD7o=
@@ -16,6 +18,8 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumC
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/digitalocean/godo v1.1.1 h1:v0A7yF3xmKLjjdJGIeBbINfMufcrrRhqZsxuVQMoT+U=
 github.com/digitalocean/godo v1.1.1/go.mod h1:h6faOIcZ8lWIwNQ+DN7b3CgX4Kwby5T+nbpNqkUIozU=
+github.com/dimchansky/utfbom v1.1.0 h1:FcM3g+nofKgUteL8dm/UpdRXNC9KmADgTpLKsu0TRo4=
+github.com/dimchansky/utfbom v1.1.0/go.mod h1:rO41eb7gLfo8SF1jd9F8HplJm1Fewwi4mQvIirEdv+8=
 github.com/dnaeon/go-vcr v1.0.1 h1:r8L/HqC0Hje5AXMu1ooW8oyQyOFv4GxqpL0nRP7SLLY=
 github.com/dnaeon/go-vcr v1.0.1/go.mod h1:aBB1+wY4s93YsC3HHjMBMrwTj2R9FHDzUr9KyGc8n1E=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=