Update git submodules

* Update docs/submodules/releng from branch 'master'
  - xci: Fix nfs server ip for glance

    Change-Id: Iebb9945bfd9cad9ebfda127f130542f4a6334aec
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8f9a532..283f6dc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8f9a53258a858b78229974cf09a3da67608ef0bd
+Subproject commit 283f6dcfbc101beb9ad85596f03c04529a7c0e61