Release os-brick 2.4.0

This releases os-brick 2.4.0 to get a number of
bug fixes released and to also add a couple of new features.
The first feature is the ability for ScaleIO to extend
attached volumes.  It also adds support for SMBFS mounting
vhd/x images.

Given the feature changes this bumps os-brick from
2.3.0 to 2.4.0.

Change-Id: I2889476829629ac0494fc9ed339ddb4a5957438b

deliverables/rocky/os-brick.yaml

@@ -6,3 +6,8 @@ team: cinder
 type: library
 repository-settings:
   openstack/os-brick: {}
+releases:
+  - projects:
+      - hash: 296887a59ef7913a857d3142cc801b347f2e6584
+        repo: openstack/os-brick
+    version: 2.4.0