Updated armband

Project: fuel  8e501a8589db2c5f29a43b5fb2d253c431397b4f

deploy: fix: remove storage files during cleanup

Remove old disks through virsh instead of calling os.delete()
methods so that the cleanup phase would succeed within a non-root
setup. [1]

Related-bug: ARMBAND-128

[1] https://gerrit.opnfv.org/gerrit/#/c/19491/

Change-Id: I90007edf014c7e15a68b9a334fcaffaa127ee4ab
Signed-off-by: Stefan Sicleru <stefan.sicleru@enea.com>
(cherry picked from commit d4f9612475a07773af182f244bcd597d25bf4cd8)

diff --git a/upstream/fuel b/upstream/fuel
index d53f15a..8e501a8 160000 (submodule)
--- a/upstream/fuel
+++ b/upstream/fuel
@@ -1 +1 @@
-Subproject commit d53f15a6dacb5e3d3fd58002692f9c08256ff1e9
+Subproject commit 8e501a8589db2c5f29a43b5fb2d253c431397b4f