**SUMMARY**

Test names must be unique per scope otherwise the second test overrides the first one with the same name.

**ISSUE TYPE**
- Bugfix Pull Request

**COMPONENT NAME**
ansible/test/units/parsing/test_mod_args.py
ansible/test/units/module_utils/facts/test_collectors.py
ansible/test/units/module_utils/common/validation/test_check_required_if.py
ansible/test/units/module_utils/basic/test_deprecate_warn.py

**ADDITIONAL INFORMATION**

For example if you had a test file that does:

```
def test_a():
    pass

def test_a():
    pass
```

Then only the second `test_a` will be ran. More details [here](https://codereview.doctor/features/python/best-practice/avoid-duplicate-unit-test-names).

These are the tests that are overriding previously defined tests due to this problem:

https://github.com/ansible/ansible/blob/de9a3bda2cfaace7e3d25b0c4774eefdd9514687/test/units/parsing/test_mod_args.py#L121
https://github.com/ansible/ansible/blob/de9a3bda2cfaace7e3d25b0c4774eefdd9514687/test/units/module_utils/facts/test_collectors.py#L397
https://github.com/ansible/ansible/blob/de9a3bda2cfaace7e3d25b0c4774eefdd9514687/test/units/module_utils/facts/test_collectors.py#L413
https://github.com/ansible/ansible/blob/de9a3bda2cfaace7e3d25b0c4774eefdd9514687/test/units/module_utils/common/validation/test_check_required_if.py#L56
https://github.com/ansible/ansible/blob/de9a3bda2cfaace7e3d25b0c4774eefdd9514687/test/units/module_utils/basic/test_deprecate_warn.py#L74

I found this issue automatically, see other issues [here](https://codereview.doctor/ansible/ansible)



__test__ = True
    gather_subset = ['!all', 'pkg_mgr']
    valid_subsets = ['pkg_mgr']
    fact_namespace = 'ansible_pkgmgr'
    collector_class = PkgMgrFactCollector
    collected_facts = {
        "ansible_distribution": "Fedora",
        "ansible_distribution_major_version": "28",
        "ansible_os_family": "RedHat"
    }
    def test_collect(self):
        module = self._mock_module()
        fact_collector = self.collector_class()
        facts_dict = fact_collector.collect(module=module, collected_facts=self.collected_facts)
        self.assertIsInstance(facts_dict, dict)
        self.assertIn('pkg_mgr', facts_dict)
class TestMacOSXPkgMgrFacts(BaseFactsTest):
    __test__ = True
    gather_subset = ['!all', 'pkg_mgr']
    valid_subsets = ['pkg_mgr']
    fact_namespace = 'ansible_pkgmgr'
    collector_class = PkgMgrFactCollector
    collected_facts = {
        "ansible_distribution": "MacOSX",
        "ansible_distribution_major_version": "11",
        "ansible_os_family": "Darwin"
    }
    @patch('ansible.module_utils.facts.system.pkg_mgr.os.path.exists', side_effect=lambda x: x == '/opt/homebrew/bin/brew')
    def test_collect_opt_homebrew(self, p_exists):