BUG: Missing SmartPointers

Some SmartPointers were missing after the test was converted to a
modern style. This caused DEBUG_LEAKS defects.

My bad...

Change-Id: I46e2203e4a9cb6fca057e4b808f3d011943c3609
Merge topic 'FixTestAxisActor3D' into master

5256ee0e BUG: Missing SmartPointers