Added update column for tracking updated entries
Refactored insert statement for evidence code
Added extra rank column for both staging tables of qualifier and
withfrom.
Refactored their insert statement accordingly to insert rank value from
staging tables.
Refactored insert statments of date, assigned_by and extra references
Added rank field in qualifier and withfrom data structures
Added tests for rank columns
Added multiple with fields in test data
Added tests for multiple values in with fields