SEBA-570 add backup/restore feature

Change-Id: I25987d3394e9416d9a67cc495bf8f8907ffe11a7
diff --git a/tox.ini b/tox.ini
index 7152507..a8ce26b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -28,6 +28,7 @@
   multistructlog
   nose2
   flake8
+  pyfakefs
 
 commands =
   nose2 -c tox.ini --verbose --junit-xml