ec2-upload-bundle doesn't work with swift3

[tikitavi]

While enabling swift3 in devstack, we've got problems with uploading the bundle to to Amazon S3.

+++ /opt/stack/ec2-api/devstack/create_config:source:232 : wget -t 2 -T 60 -q -P /tmp/bi-afba35ec http://s3.amazonaws.com/ec2-downloads/ec2-ami-tools.zip
+++ /opt/stack/ec2-api/devstack/create_config:source:233 : unzip -d /tmp/bi-afba35ec /tmp/bi-afba35ec/ec2-ami-tools.zip
+++ /opt/stack/ec2-api/devstack/create_config:source:253 : /tmp/bi-afba35ec/ec2-ami-tools-1.5.7/bin/ec2-bundle-image --cert /tmp/bi-afba35ec/cert.pem --privatekey /tmp/bi-afba35ec/private/pk.pem --ec2cert /opt/stack/data/ec2api/cacert.pem --image /tmp/cirros-0.3.4-x86_64-disk.img --prefix cirros-0.3.4-x86_64-disk.img --user 42424242424242 --destination /tmp/bi-afba35ec/images --arch x86_64
Bundling image file...
Splitting /tmp/bi-afba35ec/images/cirros-0.3.4-x86_64-disk.img.tar.gz.enc...
Created cirros-0.3.4-x86_64-disk.img.part.0
Created cirros-0.3.4-x86_64-disk.img.part.1
Generating digests for each part...
Digests generated.
Creating bundle manifest...
Bundle manifest is /tmp/bi-afba35ec/images/cirros-0.3.4-x86_64-disk.img.manifest.xml
ec2-bundle-image complete.
+++ /opt/stack/ec2-api/devstack/create_config:source:255 : /tmp/bi-afba35ec/ec2-ami-tools-1.5.7/bin/ec2-upload-bundle --url http://34.240.42.60:8080 --access-key 0b1093e216724d8b8780f4a642945033 --secret-key a141cd92cc204b98a551f47787f41388 --bucket tmp-bundle.afba35ec --manifest /tmp/bi-afba35ec/images/cirros-0.3.4-x86_64-disk.img.manifest.xml --acl public-read --sigv 2
Specifying url has been deprecated, please use only --region
Region determined to be us-east-1
Signature version 2 authentication failed, trying different signature version
Digest::Digest is deprecated; use Digest
Digest::Digest is deprecated; use Digest
Digest::Digest is deprecated; use Digest
Digest::Digest is deprecated; use Digest
Digest::Digest is deprecated; use Digest
Signature version 4 authentication failed, trying different signature version
ERROR: undefined method `body' for nil:NilClass