##### 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 -->


mock_install, mock_warning, output_dir = collection_install
    galaxy_args = ['ansible-galaxy', 'collection', 'install', 'namespace.collection', '--collections-path', output_dir,
                   '--ignore-certs']
    GalaxyCLI(args=galaxy_args).run()
    assert mock_install.call_args[0][3] is False
def test_collection_install_force(collection_install):
    mock_install, mock_warning, output_dir = collection_install
    galaxy_args = ['ansible-galaxy', 'collection', 'install', 'namespace.collection', '--collections-path', output_dir,
                   '--force']
    GalaxyCLI(args=galaxy_args).run()
    assert mock_install.call_args[0][6] is True
def test_collection_install_force_deps(collection_install):
    mock_install, mock_warning, output_dir = collection_install
    galaxy_args = ['ansible-galaxy', 'collection', 'install', 'namespace.collection', '--collections-path', output_dir,
                   '--force-with-deps']
    GalaxyCLI(args=galaxy_args).run()
    assert mock_install.call_args[0][7] is True
def test_collection_install_no_deps(collection_install):