Increase pytest timeout for source verification (#1659)

Author: pranavrth

tools/source-package-verification.sh

@@ -20,7 +20,7 @@ python setup.py build && python setup.py install
 if [[ $OS_NAME == linux && $ARCH == x64 ]]; then
     flake8 --exclude ./_venv,*_pb2.py
     make docs
-    python -m pytest --timeout 600 --ignore=dest
+    python -m pytest --timeout 1200 --ignore=dest
 else
-    python -m pytest --timeout 600 --ignore=dest --ignore=tests/integration
+    python -m pytest --timeout 1200 --ignore=dest --ignore=tests/integration
 fi