Fixes #296 - query all services for wildcard-only actions

[kmcquade]

What does this PR do?

• Fixes Can't query all services for wildcard only anymore #296. You can now query all services for wildcard-only actions again.

Note the relevant unit test under test/querying/all.py:

    def test_GH_296_query_all_actions_with_wildcard_resources(self):
        service = "all"
        resource_type = "*"
        result = query_action_table(
            service=service,
            resource_type=resource_type,
            name=None,
            access_level=None,
            condition=None
        )
        self.assertTrue(len(result) > 3000)

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• Additions and changes have unit tests
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