Temporarily keep some NodalDataBlock code active.

To keep these tests:
	  7 - KfieldBC_base_Tpetra (Failed)
	  8 - KfieldBC_Tpetra (Failed)
	120 - MechanicsTensileTet10_STK (Failed)
	121 - MechanicsTensileTet10_STK_Tpetra (Failed)
passing, we're going to temporarily keep the NodalDataBlock code. Later (after
the merge is complete), we can modify
    ./LCM/evaluators/IPtoNodalField_Def.hpp
    ./evaluators/Adapt_ElementSizeField_Def.hpp
to use NodalDataVector.