Addition of a TermCompletion flag to StudentSchoolAssociation

Summary of outcomes for Data Standard 3.2

• Problem Addressed: Term completion does not always align with an ExitWithdrawType.
• High-level Reasoning: Rather than create new descriptor values for every possible outcome, a simpler solution is to create a new element on StudentSchoolAssociation to denote if the student completed the term, regardless of the ExitWithdrawType.
• Changes Made: Added an optional boolean TermCompletionIndicator to StudentSchoolAssociation.

Original ticket description follows:

In Wisconsin, they have identified a need to separate the tracking of term completion with the ExitWithdrawType that is not met by the current data standard.

While a student may have exited with a "dropout" (or other) ExitWithdraw type, they may still have completed the necessary coursework to be considered to have completed the term. While a workaround could be used creating a duplicate set of ExitWithdraw descriptor values such as "Dropout (with completion)", that's a sub-optimal solution.

Our recommendation at this time is to create a bit value element extension on StudentSchoolAssociation. This ticket will track the issue for possible inclusion in a future release of the Ed-Fi data standard.