stubbed out rest of storage things

aif/disk/lvm.py

@@ -1,3 +1,24 @@
 from . import _common
+import aif.disk.block as block
+import aif.disk.luks as luks
+import aif.disk.mdadm as mdadm
 
-BlockDev = _common.BlockDev
+
+_BlockDev = _common.BlockDev
+
+
+class PV(object):
+    def __init__(self, partobj):
+        self.devpath = None
+        pass
+
+
+class VG(object):
+    def __init__(self, vg_xml, lv_objs):
+        self.devpath = None
+        pass
+
+
+class LV(object):
+    def __init__(self, lv_xml, pv_objs):
+        pass