replace occurences of vector with arraylist

[lluismf (Lluis Martinez)]

@teleivo

if you have more ideas or things you remember would be great to clean up, improve, please feel free to create

Make all the Hibernate*DAO extend HibernateOpenmrsObjectDAO Remove all the sessionFactory.getCurrentSession() prefixes. Invoke get/saveOrUpdate/… of the parent. Remove the sessionFactory instance variable because it won’t be used anymore.