Update py.test to pytest

Author: micw523

tox.ini

@@ -22,22 +22,22 @@ commands =
 [testenv:py27-functional]
 commands =
    python -V
-   {toxinidir}/scripts/kube-init.sh py.test -vvv -s []
+   {toxinidir}/scripts/kube-init.sh pytest -vvv -s []
 
 [testenv:py35-functional]
 commands =
    python -V
-   {toxinidir}/scripts/kube-init.sh py.test -vvv -s []
+   {toxinidir}/scripts/kube-init.sh pytest -vvv -s []
 
 [testenv:py36-functional]
 commands =
    python -V
-   {toxinidir}/scripts/kube-init.sh py.test -vvv -s []
+   {toxinidir}/scripts/kube-init.sh pytest -vvv -s []
 
 [testenv:py37-functional]
 commands =
    python -V
-   {toxinidir}/scripts/kube-init.sh py.test -vvv -s []
+   {toxinidir}/scripts/kube-init.sh pytest -vvv -s []
 
 [testenv:coverage]
 commands =