REVERT "crawl_config will merge with kwargs parameters"
REVERT "crawl_config will merge with kwargs parameters"

This reverts commit ec5dc2cf6285c01553c5983bcf17ceedcd62fb15.

luoq/pyspider,lashwang/pyspider,VDuda/pyspider,wangjun/pyspider,nicozhang/pyspider,qiulimao/weblocust,luotao19861229/pyspider,binux/pyspider,eromoe/pyspider,snakeliwei/pyspider,wonderay/pyspider,eromoe/pyspider,snakeliwei/pyspider,nicozhang/pyspider,binux/pyspider,luoq/pyspider,wangjun/pyspider,binux/pyspider,luoq/pyspider,wangjun/pyspider,VDuda/pyspider,qiulimao/weblocust,VDuda/pyspider,lashwang/pyspider,nicozhang/pyspider,wonderay/pyspider,snakeliwei/pyspider,e-dorigatti/pyspider,wonderay/pyspider,luotao19861229/pyspider,eromoe/pyspider,qiulimao/weblocust,luotao19861229/pyspider,e-dorigatti/pyspider,lashwang/pyspider,e-dorigatti/pyspider