Make use of inputCategory while initializing Student Data for CodedConcepts

[himeshr]

In Glific forms, for selectable fields, user can either specify the "Option ID" or a case-insensitive "Option value" as the input.
Therefore, the Flow_result we received, could have the inputValue for CodedConcepts in a different case than that configured in the MappingMetadata table.

Probable Fix
To handle this, make use of inputCategory while initializing Student Data for CodedConcepts.
In DataExtractorService.getResultData(), map tuple of [inputCategory, inputValue] as the value, and while populating codedConcept observation use inputCategory, otherwise use inputValue everywhere else.

Acceptance Criteria

• We should be able to sync students that have inputValue for CodeConcepts in different case than the expected one, by using inputCategory to do the mapping

[vinayvenu]

This was complete as part of #102