##### 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 -->


namespace, name = collection.split('.', 1)
        galaxy_meta = None
        for api in apis:
            try:
                if not (requirement == '*' or requirement.startswith('<') or requirement.startswith('>') or
                        requirement.startswith('!=')):
                    
                    allow_pre_release = True
                    if requirement.startswith('='):
                        requirement = requirement.lstrip('=')
                    resp = api.get_collection_version_metadata(namespace, name, requirement)
                    galaxy_meta = resp
                    versions = [resp.version]
                else:
                    versions = api.get_collection_versions(namespace, name)
            except GalaxyError as err:
                if err.http_code == 404:
                    display.vvv("Collection '%s' is not available from server %s %s"
                                % (collection, api.name, api.api_server))
                    continue
                raise
            display.vvv("Collection '%s' obtained from server %s %s" % (collection, api.name, api.api_server))
            break
        else:
            raise AnsibleError("Failed to find collection %s:%s" % (collection, requirement))
        req = CollectionRequirement(namespace, name, None, api, versions, requirement, force, parent=parent,
                                    metadata=galaxy_meta, allow_pre_releases=allow_pre_release)
        return req
def build_collection(collection_path, output_path, force):