Exam upload should test for school validity

[Ghislain Hachey]

For some reason a pain point is users loading exam data for school that are non-existent or have been inactive for years. so the validation process should check if the data being loaded for the year as a active school in that year.

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[Ghislain Hachey]

Fix in the StoredProcedure [pExamWrite].[LoadSoeExam]