When you install Aiflow with an extra, the required provider packages should be installed automatically.

For example:

`pip instal apache-airflow[google]` should install apache-airlfow-providers-google package.
setup.py
'qds': qds,
    'rabbitmq': rabbitmq,
    'redis': redis,
    'salesforce': salesforce,
    'samba': samba,
    'segment': segment,
    'sendgrid': sendgrid,
    'sentry': sentry,
    'singularity': singularity,
    'slack': slack,
    'snowflake': snowflake,
    'spark': spark,
    'ssh': ssh,
    'statsd': statsd,
    'tableau': tableau,
    'vertica': vertica,
    'virtualenv': virtualenv,
    'webhdfs': webhdfs,  
    'winrm': winrm,  
    'yandexcloud': yandexcloud,
}
devel_all = list(
    set(
        devel
        + [req for req_list in EXTRAS_REQUIREMENTS.values() for req in req_list]
        + [req for req_list in PROVIDERS_REQUIREMENTS.values() for req in req_list]
    )
)
PACKAGES_EXCLUDED_FOR_ALL = []
if PY3: