packages: secure upgrade workflow from dependency cycles

Change the workflow to be:
Upgrade all packages before any services that is notified & managed by
Puppet.
It also disable the Exec timeout so we rely on Heat timeout and not on
the 300s that are the default in Puppet [1]

Example: we upgrade and OpenStack config will change (obviously).
         Puppet catalog will contain 3 important things:
           * config resources
           * service resources
           * package-upgrade Exec resource
         with that patch, what will happen:
           * puppet will update config first or second and notify
             services
           * puppet will run package-upgrade first or second but before
             the package-upgrade Exec resource
           * at the very end, puppet will restart services

That way, we avoid complications with Puppet dependency cycle issues.

[1] https://docs.puppetlabs.com/references/latest/type.html#exec-attribute-timeout

Closes-Bug: 1536349
Change-Id: I07310bdfc5b07b03ac9fa5f8c13e87eaa2bfef4d

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