[hibernate-dev] instrument tasks

So Scott has finished up HHH-1931 in regards to the cglib instrumentation task. The underlying issue was that the javassist and cglib versions did slightly different things in regards to instrumenting field access. Javassist only instrumented access to fields which are declared on the class being transformed; cglib transformed ever field access. Both are actually valuable approaches in different situations. For the time being, the cglib based task was made to not instrument access to fields declared outside the transforming class. I think the opposite approach is valuable when the field's owner is also being instrumented. So another capability to add here is for both of the instrument tasks to be able to instrument access to fields which are declared outside the class being transformed currently as long as the declaring class is also being transformed. Another capability that I would like to see would be to limit instrumentation to only fields which are defined in a Hibernate mapping. Currently the instrument tasks do not know anything about the mappings, so the first change to allow this would be facilitate the passing or definition of a Configuration into the tasks. The tools already have such a task used in their ant task stacks. So we would need to decide whether it makes more sense to move the instrument tasks over to the tools subproject, or to consume the <configuration/> sub task from tools into core and make use of it from the instrument tasks.