Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Make volumes appear as SCSI devices in aarch64"
  - Make volumes appear as SCSI devices in aarch64

    Adding volumes in openstack by default uses virtio_blk and the
    devices appear as /dev/vdX. In aarch64 however a qemu pci slot
    is already in use so the tests cannot assign more than one volume
    to a VM. Forcing the drives to use virtio-scsi solves the issue
    and allows more volumes to be attached as /dev/sdX. The variable
    defining the drive is VOLUME_DEVICE_NAME and is passed as
    environmental variable when the container is created.

    JIRA: ARMBAND-376

    Change-Id: Ia688cff338ff319e22a3b26796fa197297c23ce0
    Signed-off-by: Charalampos Kominos <Charalampos.Kominos@enea.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 213ca8e..601781b 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 213ca8e4e4d155ed6d5626020e56c3a241d1dace
+Subproject commit 601781b8020c267618bb7bfe3fc4cbe2bedc40b3