##### SUMMARY
If you have executable files in your source code they are not kept in the tarball.

Could be related to https://github.com/ansible/ansible/blob/99d7f150873011e7515851db9b44ff486efa9d77/lib/ansible/galaxy/collection.py#L763

This was noticed as I had some auxiliary scripts in my repo.

Need to also consider scripts in `files/` if/when Collections support roles.

This seems to fail the "principal of least suprise"

**Proposal 1: Keep on stripping executable flags**

Add some line to the output
`WARNING: tests/coverage.sh: source file has executable flag, though this will be ignored in generated tar.gz`
Update developing a collection documentation page
Update integration tests to ensure that executable mode is always stripped.
Update code to link to this issue

**Proposal 2: Allow executible flags**

Update developing a collection documentation page
Update integration tests to ensure that executable mode is preserved
Update code to link to this issue
Changelog


##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
ansible-galaxy

##### ANSIBLE VERSION
```paste below
2.10
```

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

<!--- HINT: You can paste gist.github.com links for larger files -->


@classmethod
    def setUpClass(cls):
        cls.setUpRole('delete_me_apb', galaxy_args=['--type=apb'])
    def test_metadata_apb_tag(self):
        with open(os.path.join(self.role_dir, 'meta', 'main.yml'), 'r') as mf:
            metadata = yaml.safe_load(mf)
        self.assertIn('apb', metadata.get('galaxy_info', dict()).get('galaxy_tags', []), msg='apb tag not set in role metadata')
    def test_metadata_contents(self):
        with open(os.path.join(self.role_dir, 'meta', 'main.yml'), 'r') as mf:
            metadata = yaml.safe_load(mf)
        self.assertEqual(metadata.get('galaxy_info', dict()).get('author'), 'your name', msg='author was not set properly in metadata')
    def test_apb_yml(self):
        self.assertTrue(os.path.exists(os.path.join(self.role_dir, 'apb.yml')), msg='apb.yml was not created')
    def test_test_yml(self):
        with open(os.path.join(self.role_dir, 'tests', 'test.yml'), 'r') as f:
            test_playbook = yaml.safe_load(f)
        print(test_playbook)
        self.assertEqual(len(test_playbook), 1)
        self.assertEqual(test_playbook[0]['hosts'], 'localhost')
        self.assertFalse(test_playbook[0]['gather_facts'])
        self.assertEqual(test_playbook[0]['connection'], 'local')
        self.assertIsNone(test_playbook[0]['tasks'], msg='We\'re expecting an unset list of tasks in test.yml')
class TestGalaxyInitContainer(unittest.TestCase, ValidRoleTests):
    @classmethod
    def setUpClass(cls):