Failure in package installation during bootstrapping is not detected

[nazarhussain]

Expected behavior

If anything get problem and npm install failed during the bootstrapping. The command should be able to detect it and report to user to manually install the packages.

Actual behavior

If package installation fails it shows the error but end with following message:

All set! Run below command to start your blockchain app.

This message is confusing for user if process was successful or not.

Steps to reproduce

1. It usually fail due to dependency issues
2. But we can trigger the failure by adding invalid package to package.json in the template.

Which version(s) does this affect? (Environment, OS, etc...)

5.1.0