BUG: Use NewMacro for Clone with TimeVaryingVElocityFieldTransforms

The parents superclass' clone method was used resulting in Clone
method different then the Self type.

Change-Id: I50492ade82d5b0bd37d293bbe771f20511d433a8
Merge topic 'UseNewMacroForClone'

f49605bd BUG: Use NewMacro for Clone with TimeVaryingVElocityFieldTransforms