[Testframe] add cov info into report xml test/tools/br/js/TRunner.js : 重构，追加覆盖率信息
[Testframe] add cov info into report xml
test/tools/br/js/TRunner.js : 重构，追加覆盖率信息
BaiduFE/Tangram-base,BaiduFE/Tangram-base,BaiduFE/Tangram-base