##### 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 -->


''' verifies that the GalaxyCLI object's api is created and that execute() is called. '''
        gc = GalaxyCLI(args=["ansible-galaxy", "install", "--ignore-errors", "imaginary_role"])
        gc.parse()
        with patch.object(ansible.cli.CLI, "run", return_value=None) as mock_run:
            gc.run()
            
            self.assertIsInstance(gc.galaxy, ansible.galaxy.Galaxy)
            self.assertEqual(mock_run.call_count, 1)
            self.assertTrue(isinstance(gc.api, ansible.galaxy.api.GalaxyAPI))
    def test_execute_remove(self):
        
        gc = GalaxyCLI(args=["ansible-galaxy", "install", "-p", self.role_path, "-r", self.role_req, '--force'])
        gc.run()
        
        role_file = os.path.join(self.role_path, self.role_name)
        
        
        
        co.GlobalCLIArgs._Singleton__instance = None
        gc = GalaxyCLI(args=["ansible-galaxy", "remove", role_file, self.role_name])
        gc.run()
        
        removed_role = not os.path.exists(role_file)
        self.assertTrue(removed_role)
    def test_exit_without_ignore_without_flag(self):