add tests for sitemapindex
add tests for sitemapindex

pablohoffman/scrapy,elacuesta/scrapy,dangra/scrapy,pawelmhm/scrapy,pawelmhm/scrapy,pablohoffman/scrapy,pablohoffman/scrapy,eLRuLL/scrapy,scrapy/scrapy,starrify/scrapy,pawelmhm/scrapy,elacuesta/scrapy,starrify/scrapy,elacuesta/scrapy,wujuguang/scrapy,finfish/scrapy,starrify/scrapy,eLRuLL/scrapy,dangra/scrapy,wujuguang/scrapy,wujuguang/scrapy,eLRuLL/scrapy,dangra/scrapy,finfish/scrapy,finfish/scrapy,scrapy/scrapy,scrapy/scrapy