add coco to anylasis spec rate
tmp solution to avoid instance not destroy
Merge branch 'x-plat_bugfix_piaoyi' into x-plat_dev
bugfix:
1. app link eixt 255 because terminal output to large(fix by modify buildpack)
2. app crash but not destory because hang in call warden copy_out.(just skip this operation)
change Gemfile
Merge pull request #4 from X-Plat/x-plat_bugfix_piaoyi

测有点问题，主要原因是Gemfile.lock的问题，先过再修。