Fixed sub-schema errors, refactored names
AssetTypeContactAssignments->AssetTypeManufacturerContactAssignments,
SpareContactAssignments->SpareSupplierContactAssignments, and
WarrantyContactAssignments->WarrantyGuarantorContactAssignments.

Fixed cobielite_core.xsd documentation errors.

Corrected rc2->rc3 mapping errors.