[JY] NA enable Install-NuDeployEnv given environment definition file
[JY] refactor Install-NudeployEnv
[JY] Ignore previously deployed packages
[JY] refactor Install-NudeployEnv
[JY] add app config check before deployment
[JY] Add env config verification check
[JY] bring back lost file during merge
[JY] remove unused deployAppResultDir