Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "lib.sh: Remove all storage on undefine"
  - lib.sh: Remove all storage on undefine

    While executing the deploy script via sudo will raise no issues with
    re-using old storage volume files, non-root deploys fail to change
    ownership of said files.

    Properly clean after ourselves when destroying and undefining VMs.

    JIRA: ARMBAND-311

    Change-Id: I7fdd269dccbfd5ab5285d852ac7dacfc4dc5ccd7
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 32b75cc..e53acf4 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 32b75cc293bf0402302ee674a0a0064456d219c7
+Subproject commit e53acf41e4659140e3f78794765bb87f1dc59136