Improve Automation debugging features

User story :
I'm a Studio designer and I wrote a workflow using several Automation chains I designed.
From Nuxeo I start a workflow and get an error due to Automation.

I must be able to do this:

• I go to the admin center to activate Automation tracing.
• I do my workflow operation that fails.
• I come back to the admin center and see a full trace of the operations and their arguments that have been executed, broken down by user and date.
• I deactivate Automation tracing.

Technical description
Give the possibility for the client to retrieve a full execution stack.

Here are the steps to follow

• add callback logic in automation processing, provide callback for stack capture
• allow to activate / deactivate the tracking using a JMX or REST API
• integrate with unit test case
• integrate a stack reference in the Exception that is returned to the client
• integrate with web engine module : debug resource where I can retrieve the stack using the stackId provided inside the Excception
• (optional) integrate with nuxeo shell