Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Remove the quotes from the external network name

    If we leave the quotes, functest will search for a neutron network with the
    name "ext-net" instead of ext-net and will fail

    Change-Id: I4ef62fa6ea69573f5872b864402ddb8644ce432d
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index dfd9229..5aafda4 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit dfd9229ad20d0ff724ce5ccf45161c8eb5e2c9e5
+Subproject commit 5aafda4cedcf64d8261df853d749a328ed309784