** Changed a bit unorthodox way to define a clob field to use more
ordinary way to do the same thing in CourseDescription entity
** Updated test database create and drop sql scripts
** Changed student rest service delete student method to remove
associated user variables when permanently deleting student
** Fixed bug in rest ObjectFactory that caused calls that return
UserVariableKeys to fail
** Changed StudentDAO create method to automatically assign newly
created students externalId -1, authProvider internal and STUDENT role
** Fixed rest-it tests to work with changes in the code
** Fixed ui test sql scripts