testing: append the tests to the given variable

Change-Id: Ib63073b5ce7a740a2bfb43383dc5cd1841aae239
Merge topic '14244_fix_stereo_image_captures' into pv-master

edbb4ffe Merge topic '14244_fix_stereo_image_captures' into master
fa145803 Merge topic 'python-algorithm-old-python' into master
4b74588b vtkPythonAlgorithm: support older pythons
a4e10e46 Merge topic 'manual-VTKData-option' into master
56251ee5 Merge remote-tracking branch 'pvvtk/pv-master' into HEAD
7442036b Merge topic 'python-algorithm' into master
169f0154 BUG #14244: Fix stereo image captures.
6691160f FiltersPython: create a vtkPythonAlgorithm class
e8ba24a5 vtkAlgorithm: fix a typo
fec99e56 Add option to exclude VTKData target from default build
Merge remote-tracking branch 'pvvtk/pv-master' into HEAD

* pvvtk/pv-master:

Change-Id: I76012fe6b08baf4f580d6e6d53e5feca034755bc
Merge topic 'append-tests' into master

788a28b1 testing: append the tests to the given variable