Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 3e8a8868d7ef936ad85a360845d2c071d585c57b
  - Merge "Adding Ubuntu support in Ansible - vncserver role"
  - Adding Ubuntu support in Ansible - vncserver role

    Extending ansible playbooks of ubuntu support.
    Creating new test with Ubuntu image for Molecule in vncserver role.

    Issue-ID: OOM-1671
    Signed-off-by: Jan Benedikt <j.benedikt@partner.samsung.com>
    Change-Id: Ie57885d30166f319629e160c38a9053c18837515

diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 2c34d1d..3e8a886 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 2c34d1d7a33e34c9984ac78460fd8e7c815024c5
+Subproject commit 3e8a8868d7ef936ad85a360845d2c071d585c57b