optimize work horse initialization by configuration mappers on the worker process (#4314)
optimize work horse initialization by configuration mappers on the worker process (#4314)


denisov-vlad/redash,getredash/redash,getredash/redash,alexanderlz/redash,denisov-vlad/redash,alexanderlz/redash,getredash/redash,alexanderlz/redash,denisov-vlad/redash,denisov-vlad/redash,getredash/redash,alexanderlz/redash,denisov-vlad/redash,getredash/redash