RevEng: Pass in correct argument values to ScaffoldingTypeMapper

[smitpatel]

Our ScaffoldingTypeMapper takes information about column being keyOrIndex or rowversion when determining what to scaffold for store type (since keys have restricted size by default etc.)
Since there is no direct way to get that information out of ColumnModel, we are passing false flag. Which generates extra redundant Fluent API calls.

This issue is to make appropriate changes to Provider specific ScaffoldingHelper or ColumnModel which facilitate in above task and make the ScaffoldingTypeMapper more accurate.