##### 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 -->


def __init__(self, display_queue):
            self.display_queue = display_queue
        def __getattr__(self, attr):
            def call_display(*args, **kwargs):
                self.display_queue.put((attr, args, kwargs))
            return call_display
    
    global display
    old_display = display
    try:
        display_queue = queue.Queue()
        display = DisplayThread(display_queue)
        t = threading.Thread(target=progress, args=(display_queue, old_display))
        t.daemon = True
        t.start()
        try:
            yield
        finally:
            t.finish = True
            t.join()
    except Exception:
        
        raise
    finally:
        display = old_display
def _get_galaxy_yml(b_galaxy_yml_path):