Add test coverage back

Author: nadiaya

tox.ini

@@ -51,7 +51,7 @@ passenv =
     AWS_DEFAULT_REGION
 commands =
     coverage run --source sagemaker_pytorch_serving_container -m pytest {posargs}
-    {env:IGNORE_COVERAGE:} coverage report --fail-under=80 --include *sagemaker_pytorch_serving_container*
+    {env:IGNORE_COVERAGE:} coverage report --fail-under=95 --include *sagemaker_pytorch_serving_container*
 deps =
     coverage
     pytest