Added basic tests for 'packages_directory' feature.

[midnightercz]

Module: pulp_smash.tests.rpm.api_v2.test_packages.directory
TestCase: PackagesDirectoryTestCase

• tests if default location of published packages
• tests custom location of published packages

Fix: #300

[coveralls]

Changes Unknown when pulling 1c137e3 on release-engineering:test_packages_directory into * on PulpQE:master*.

[Ichimonji10]

This test passes, but it doesn't actually test whether the packages_directory feature works or not. The problem lies with this snippet of code:

packages_locations = get_locations(self.responses['publish2_xml'])
for location in packages_locations:
    self.assertEqual(os.path.dirname(location), 'Packages')

This bit of code assumes that several packages_locations have been found. However, due to the way get_locations is implemented, packages_locations is an empty list.

I believe the fix is to use different namespaces in the XPath expressions. I'll try it out tomorrow, and if it works, will use the fix in a follow-up commit.

[Ichimonji10]

I've taken a good, close look at the code, and there's a few things that need to be fixed up. Given how much time I've spent looking at the code, and how much time I've spent toying around with new solutions, I'll work on coming up with additional commits that satisfy my concerns.

[Ichimonji10]

Superseded by #331.