added files for Chapter 7 : Querying Objects with Criteria
updated configuration file for chapter 7
* fixed formatting
* removed overloaded constructor
* grouped fields with accessor & mutator methods
formatting
Deleted Chapter.Seven.HibernateHelper.java
Use Chapter.Three.Cameron_McKenzie.HibernateUtil.java instead
fixed typo in configuration file, HibernateUtil now runs without errors
formatting
added convenience method
fixed type in mapping file
Chapter.Seven.CriteriaExample.java can now populate the database
Merged contents of method displaySupplierList into the method executeOneToManyAssociationsCriteria.
Commented that method runs, but does not produce the correct output.
* uncommented displaySupplierList method
* made displaySupplierList method private
* got executeAssociationsSortingCriteria method to run (has a bug though)
* executeAssociationsSortingCriteria and executeOneToManyAssociationsCriteria methods both call displaySupplierList method
got executeQBECriteria method to run (still has a bug though)