Add timeout for pytest<5

.travis.yml

@@ -67,6 +67,7 @@ install:
     # faulthandler support not built in to pytest for python 2.7
     - if [ "${PYTHON}" == "2.7" ]; then
         pip install pytest-faulthandler;
+        export PYTEST_ADDOPTS="--faulthandler-timeout=15";
       fi;
 
     # Debugging helpers

azure-test-template.yml

@@ -102,6 +102,7 @@ jobs:
       if [ $(python.version) == "2.7" ]
       then
         pip install pytest-faulthandler
+        export PYTEST_ADDOPTS="--faulthandler-timeout=15"
       fi
     displayName: "Install Dependencies"