Add an acceptance test for the aix package provider

This file provides a baseline of test coverage for the aix package
provider, including installation, upgrade, downgrade (which ought to
fail) and removal, all using puppet apply.
Don't create .toc file in aix package provider acceptance test

It turns out installp will automatically create this file when invoked,
which means it doesn't need to be taking up valuable screen real-estate
in this acceptance test.
Cleanup tmp dir after running aix package provider test
Use actual package name for acceptance test

This was using an old placeholder and never got updated. The test wasn't
failing because it was expecting the command it was running to fail
because the package didn't existed, which of course would always be
true.
Merge pull request #1434 from nicklewis/aix-package-provider-acceptance-tests

(AIX) Add an acceptance test for the aix package provider