Fix integration spec

After buildpacks get cloned outside app dir,
the size of droplet is decreased.
Dea publishes droplet exit status, description during crash.
Set exit status and exit description before state change.
Remove stale comment
Merge branch 'master' of https://github.com/limengyun2008/dea_ng into dev
Merge pull request #1 from limengyun2008/dev

修改配置文件并修改java buildpack
add java python buildpack
Merge branch 'dev' of https://github.com/youdao-cf/dea_ng into dev
add php build pace
modify python buildpack
modify java buildpack
modify php buildpack
modify buildpacks java