AppGen issues - inheritance & test data generation

 Two issues addressed that are in AppGen up through 1.8.1 --

(1) It does not find properties/methods that are defined on
superclasses of the model class that is the target of the code
generation. This is typical when using Hibernate's "joined-subclass"
inheritance mapping strategy. if you have for example a BaseCustomer
class that contains common customer attributes, and then
IndividualCustomer and BusinessCustomer classes that inherit from it,
AppGen will not include the properties from BaseCustomer when you
generate code for BusinessCustomer. This was fixed by changing the
Xdoclet java code in appgen to have it look at superclass methods as
well as the methods of the target class. There were also some side
effects that had to be addressed by changing the Xdoclet property used
in the .xdt templates to obtain the "current" class name, making sure
that "current" always meant the class that generation was invoked for,
and not a superclass.

(2) Various issues with the test data generated by AppGen:
- String values that are too long for the field, resulting in
truncation & sometimes a violation of uniqueness constraints. Solved
by generating a string of random letters (alternating upper & lower
case) that is exactly the length specified in the hibernate xdoclet
tag's "length" attribute. If no length attribute is found, defaults to
25. (Not sure if this can happen?)
- Numeric values that aren't appropriate for the property/column type.
Code now generates random numeric values that are specific to the
numeric type of the property - [Ll]ong, [Ii]nt, [Bb]yte, [Ss]hort,
etc.
End results of this:
- No more need to hand-edit sample-data.xml to correct
uniqueness/truncation issues.
- No more need to hand-edit various junit test classes to correct
incorrect numeric datatype assignments.

I also cleaned up a few other small issues I saw, such as code
templates with comments that referred to a "person" or "user" object.
They now refer to the name of the model object being generated.