qubes/storage: add resize to Pool API

It was already implemented by FilePool and used by Storage object, but
wasn't included in base class.

qubes/storage/__init__.py

@@ -550,6 +550,13 @@ class Pool(object):
         '''
         raise self._not_implemented("reset")
 
+    def resize(self, volume, size):
+        ''' Expands volume, throws
+            :py:class:`qubes.storage.StoragePoolException` if
+            given size is less than current_size
+        '''
+        raise self._not_implemented("resize")
+
     def revert(self, volume, revision=None):
         ''' Revert volume to previous revision  '''
         raise self._not_implemented("revert")

qubes/storage/lvm.py

@@ -201,7 +201,7 @@ class ThinPool(qubes.storage.Pool):
         self.create(volume)
 
     def setup(self):
-        pass  # TODO Should we create a non existing pool?gt
+        pass  # TODO Should we create a non existing pool?
 
     def start(self, volume):
         if volume._is_snapshot: