add default-exception-handlers to chef-client

Add ability to disable automatic use of `Chef::Handler::ErrorReport`. Unfortunately, ErrorReport is very resource hungry, as it dumps node information into `failed-run-data.json`.

It is responsible for [ErrorHandler json format can cause complete meltdown of chef client](http://tickets.opscode.com/browse/CHEF-2694) and we think there should be a way to disable it.