Console-cli should report on cause of deployment failure

[sodul]

Related to https://github.com/linkedin/glu/issues/173.

When deploying from the console-cli we only have black/white results, meaning we need to manually log to the console and look at the output for cause of failure.

If a deployment fails, getting the tail output of the first groovy script that failed would speed up troubleshooting a lot.

Or current implementation is that most of our users rarely log directly to the console but we have Jenkins jobs that call console-cli to update the models automatically. Having the tail log on failure would improve productivity, and maybe even allow us to generate reports on the common causes of failures.

[sodul]

FYI, I'll take a look at adding this to the console-cli code since it is written in Python.

[sodul]

Part of this was implemented in 5.5.2: https://github.com/pongasoft/glu/pull/267