fixed delete_rec and cleaned up some code to set a pk_val and pk_key at
start of update functions. added a function _get_table_record_dict to
give a dict representation of whats in memory
added a scenario test to delete rec and also test in mem rep as well in
db
in memory representation test added to all tests. began refactoring out
common code
remaining code from thre last commit -- in memory representation test
added to all tests. began refactoring out
common code
fixed a bug where args were not getting passed into DatabaseTable
more of the last commit