cloud_providers.ec2.image is not honoured when encrypted image already exists

[dne]

A change of EC2 image is not respected if an existing encrypted image already exists in your AWS account.

To Reproduce

Steps to reproduce the behavior:

1. Enable cloud_providers.ec2.encrypted
2. Deploy Algo on EC2 with default Ubuntu image (ubuntu-disco-19.04)
3. Change image to "ubuntu-bionic-18.04"
4. Deploy Algo on EC2 again

Expected behavior

The first Algo instance running Ubuntu 19.04, and the second one running Ubuntu 18.04. Instead you end up with two instances running 19.04.

Proposed solution

Tag the encrypted image with the source image's name (and owner?), and add that to the filter in the "Check if the encrypted image already exist" task.

[jackivanov]

Thanks for reporting @dne! Can you try this PR out, please? #1530

[dne]

Thanks for reporting @dne! Can you try this PR out, please? #1530

Really sorry for not being more helpful – currently vacationing (and using Algo of course!)…

#1530 LGTM though.