Re-add sleep of 2 sec before looking for partitions

[thomasmerx]

This fixes issue #162 and #165. I refactored the timeout handling, with #169 by increasing the existing timeout and removing the additional 2 sec sleep, because the 2 sec sleep was not working in all cases. Unfortunately, the increase alone is not sufficient, so I'm re-adding the 2 sec sleep again.

[solo-build-bot[bot]]

Waiting for approval from someone in the solo-io org to start testing.

[denravonska]

Is there going to be a release with this fix soon? It's hitting us hard in our CI :(

[alexander-ukolov]

Hello @yuval-k, @nfuden! Could you please create a new release that includes this fix? Version 0.2.8 cannot be used in the build.pkr.hcl file:

 packer {
  required_plugins {
    arm-image = {
      version = ">= 0.2.8"
      source  = "github.com/solo-io/arm-image"
    }
  }
}

logs:

Failed getting the "github.com/solo-io/arm-image" plugin:
2 errors occurred:
	* could not get sha256 checksum file for github.com/solo-io/arm-image version 0.2.8. Is the file present on the release and correctly named ? GET https://github.com/solo-io/packer-plugin-arm-image/releases/download/v0.2.8/packer-plugin-arm-image_v0.2.8_SHA256SUMS: 404  []
	* could not install any compatible version of plugin "github.com/solo-io/arm-image"