##### 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 -->


with _get_tar_file_member(tar, filename) as tar_obj:
        with tempfile.NamedTemporaryFile(dir=b_temp_path, delete=False) as tmpfile_obj:
            actual_hash = _consume_file(tar_obj, tmpfile_obj)
        if expected_hash and actual_hash != expected_hash:
            raise AnsibleError("Checksum mismatch for '%s' inside collection at '%s'"
                               % (to_native(filename, errors='surrogate_or_strict'), to_native(tar.name)))
        b_dest_filepath = os.path.join(b_dest, to_bytes(filename, errors='surrogate_or_strict'))
        b_parent_dir = os.path.split(b_dest_filepath)[0]
        if not os.path.exists(b_parent_dir):
            
            
            os.makedirs(b_parent_dir)
        shutil.move(to_bytes(tmpfile_obj.name, errors='surrogate_or_strict'), b_dest_filepath)
def _get_tar_file_member(tar, filename):
    n_filename = to_native(filename, errors='surrogate_or_strict')
    try:
        member = tar.getmember(n_filename)
    except KeyError:
        raise AnsibleError("Collection tar at '%s' does not contain the expected file '%s'." % (
            to_native(tar.name),
            n_filename))
    return _tarfile_extract(tar, member)
def _get_json_from_tar_file(b_path, filename):