Added md5sums and cleaned up the list files for dpkg packages

[miller79]

Summary

This is a continuation of scanner related issues with the tiny image. This change does the following

• Cleans up the list file creation by doing 3 steps
  • Creates the list file using dpkg-deb -c $pkg*.deb | awk '{print substr($6, 2)}'
  • Replaces the first line with "/."
  • Removes the final "/" from all lines that end with a "/"
• Creates the $pkg.md5sums file by using the command dpkg-deb -e $pkg*.deb MD5SUMS
• Added test cases to address these changes.

This PR should address what is mentioned in the following issue (paketo-buildpacks/jammy-tiny-stack#153)

This is the PR for Jammy Tiny Stack related to this PR (paketo-buildpacks/jammy-tiny-stack#190)

Use Cases

These changes will hopefully address the issues from scanning tiny images with false positives with CVEs.

Checklist

• I have viewed, signed, and submitted the Contributor License Agreement.
• I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• I have added an integration test, if necessary.
• I have reviewed the styleguide for guidance on my code quality.
• I'm happy with the commit history on this PR (I have rebased/squashed as needed).

[jericop]

This looks good. I will wait until #10 has been merged before approving this PR.

[pacostas]

LGTM

[jericop]

Looks like acceptance tests are failing, so I removed the approval until that is resolved.

[miller79]

Looks like acceptance tests are failing, so I removed the approval until that is resolved.

Is that from the changes from the other PR that was merged?

[pacostas]

Looks like acceptance tests are failing, so I removed the approval until that is resolved.

Is that from the changes from the other PR that was merged?

Sorry, this is my bad, I'll fix it right away

[pacostas]

@miller79 It will pass now, sorry for the confusion :)

[miller79]

@miller79 It will pass now, sorry for the confusion :)

Thanks for the assistance!