[BEN-123] Fix IPS package must create symlinks to package commands

[jaymalasinha]

Description

IPS package creation script looks for symlinks.erb in local project resources and adds them to
manifest file so the IPS package will install symlinks from the template. These are the links added by post install scripts for other package types. But since IPS does not use post install scripts they need to be added here.

Fixes issue: chef/chef#5458

---

/cc @chef/omnibus-maintainers <- This ensures the Omnibus Maintainers team are notified to review this PR.
@chef/engineering-services

Maintainers

Please ensure that you check for:

• [] If this change impacts git cache validity, it bumps the git cache
  serial number
• [] If this change impacts compatibility with omnibus-software, the
  corresponding change is reviewed and there is a release plan
• [] If this change impacts compatibility with the omnibus cookbook, the
  corresponding change is reviewed and there is a release plan
  • Looks for symlinks.erb in project directories and adds them to
    manifest file
  • Add unit tests for symlinks file creation
  • Update unit tests for manifest file creation

Signed-off-by: Jaymala Sinha [email protected]

[scotthain]

I think you'll want to merge this to master then we can cherry-pick it to rhass/COOL-502_with_gcc_investigate - does that sound correct?

[jaymalasinha]

closing this rebasing to master instead. Will submit a new PR for master branch