* and stop setting default values in python operator code, so defaults can be set at the server side.

This issue is just for the PR and questions from maintainers. 
setup.py
"""
    Checks if package should be excluded.
    :param package: package name (beginning of it)
    :param exclusion_list: list of excluded packages
    :return: true if package should be excluded
    """
    return any(package.startswith(excluded_package) for excluded_package in exclusion_list)
devel_all = [
    package
    for package in devel_all
    if not is_package_excluded(package=package, exclusion_list=PACKAGES_EXCLUDED_FOR_ALL)
]
devel_ci = devel_all
EXTRAS_REQUIREMENTS["doc"] = doc
EXTRAS_REQUIREMENTS["devel"] = devel_minreq  
EXTRAS_REQUIREMENTS["devel_hadoop"] = devel_hadoop  
EXTRAS_REQUIREMENTS["devel_all"] = devel_all
EXTRAS_REQUIREMENTS["devel_ci"] = devel_ci
def sort_extras_requirements() -> Dict[str, List[str]]: