DevOps: Move rereruns to parameters that can be overwritten.

The reruns option cannot be used with debug mode, so this command
`tox -e tests-lab-3 -- --pdb` overwrites the reruns option

Author: agoscinski

tox.ini

@@ -42,7 +42,7 @@ deps =
 commands =
     # converts the python files to ipython notebooks
     jupytext tests/notebooks/*.py --to ipynb
-    pytest {posargs:-v} --reruns 2 --driver Firefox
+    pytest {posargs:-v --reruns 2} --driver Firefox
 
 [testenv:tests-lab-4]
 description =
@@ -75,7 +75,7 @@ deps =
 commands =
     # converts the python files to ipython notebooks
     jupytext tests/notebooks/*.py --to ipynb
-    pytest {posargs:-v} -m "not matplotlib" --reruns 2 --driver Firefox
+    pytest {posargs:-v --reruns 2} -m "not matplotlib" --driver Firefox
 
 [testenv:coverage]
 # We do coverage in a separate environment that skips the selenium tests but