Refactor nbhelper

Change-Id: I69d10d164fac3eb319e072447a520905880c31dd
diff --git a/scripts/nbhelper/__init__.py b/scripts/nbhelper/__init__.py
new file mode 100644
index 0000000..7755623
--- /dev/null
+++ b/scripts/nbhelper/__init__.py
@@ -0,0 +1,8 @@
+from .utils import initialize
+from .tenant import Tenant
+from .device import Device, VirtualMachine
+from .service import (
+    dhcpSubnetConfigGenerator,
+    dnsFowardZoneConfigGenerator,
+    dnsReverseZoneConfigGenerator,
+)