Release os-brick 0.4.0

Mainly needed for commit c16abad3d8b771ffa80bf0984cf180506fd86eaf so
that nova/cinder and os-brick don't have a circular dependency when it
comes to rootwrap filters.

Version is 0.4.0 since there are dependency updates.

Once this is done we should be able to move forward on using the
rootwrap filter in devstack change
I9d77783c4cc8d8db7fff21543526fd4060f8b12b.

Partial-Bug: #1479842

Change-Id: I7c0b7976bf0d00caec59e20b3a1388438b3bc373

deliverables/liberty/os-brick.yaml

@@ -23,3 +23,9 @@ releases:
         hash: 1a7fe6c8148701d8dd2d477e2ba2f7d0e55b4a8f
         highlights: >
          PBR changelog generator, and FC device path removal fixes.
+  - version: 0.4.0
+    projects:
+      - repo: openstack/os-brick
+        hash: 891cf03109b3750ec05fb9b53cb48584a16114ae
+    highlights: >
+        rootwrap filter, dependency updates and bug fixes.