Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to cb94aefb4ef22fdf435578e676823a6b9600cbb9
  - Merge "Replace VNC server docker image"
  - Replace VNC server docker image

    Replace VNC server docker image based on CentOS
    (consol/centos-icewm-vnc:1.4.0) by the one based on
    Ubuntu (consol/centos-icewm-vnc:1.4.0) - Ubuntu based image is smaller
    and the VNC server does not work in the current CentOS based image.

    Solves OOM-1819

    Issue-ID: OOM-1821

    Change-Id: I9e06ab8bfccb11ae8950717db5339062704a31f9
    Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>

diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 8cbef61..cb94aef 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 8cbef61dee77ba2a77120b9b512e4e6971fa2af9
+Subproject commit cb94aefb4ef22fdf435578e676823a6b9600cbb9