Packer-azure_arm: Use latest custom managed image name as source image

[ghost]

This issue was originally opened by @shriganeshs as hashicorp/packer#5731. It was migrated here as a result of the Packer plugin split. The original body of the issue is below.

---

Similar to the following way provided for amazon_ebs builder

"source_ami_filter": {
    "filters": {
        "name": "*custom_centos7_python36*"
    }, 
    "most_recent": "true"
} 

How can I get the latest source image custom_managed_image_name for Azure?

I will be storing images with name as custom_centos7_python36_{{timestamp}}, and I want to use the latest image as source image for new Packer build.

• Packer version 1.1.1