Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 891b8dd0663475ec6f37be8ce0f45f897540fab2
  - Merge "Fix for Molecule images build-all.sh"
  - Fix for Molecule images build-all.sh

    ansible/test/images/docker/build-all.sh works only if executed under folder where script is located.

    Change-Id: Ic91656656788a48bdd12cb8003e875011a71cbe3
    Issue-ID: OOM-1829
    Signed-off-by: Mateusz Pilat <m.pilat@partner.samsung.com>

diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 517e457..891b8dd 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 517e4576afcdd6b59a3b552ea394901c2003ca0a
+Subproject commit 891b8dd0663475ec6f37be8ce0f45f897540fab2