[master 4/4] Do basic child accounting when replacing a parent.

[dashea]

From: David Lehman

---
 blivet/devices/lib.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/blivet/devices/lib.py b/blivet/devices/lib.py
index 5faada5..f760c89 100644
--- a/blivet/devices/lib.py
+++ b/blivet/devices/lib.py
@@ -169,12 +169,19 @@ def replace(self, x, y):

.. note::

+                This method does update the child counts for the two devices.
+
+            .. note::
+
                 It is usually a bad idea to bypass the callbacks. This is
                 intended for specific circumstances like toggling encryption of
                 container member devices in the devicefactory classes.
+
         """
         if x not in self.items:
             raise ValueError("item to be replaced is not in the list")

idx = self.items.index(x)
         self.items[idx] = y
+        x.removeChild()
+        y.addChild()