Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to cb8f5b24417812e9692d1378588e41a6ddc14db2
  - Change group_vars inclusion mode in rke role tests

    Inclusion switched from inventory.links declaration in
    molecule config to filesystem symlink.

    Change-Id: Idcdd40ba196963f61b587c78718564c9374fa731
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
    Issue-ID: OOM-2259

diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 4f7bf1c..cb8f5b2 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 4f7bf1c03c5e8ceb1c46d578696e2e90b369c469
+Subproject commit cb8f5b24417812e9692d1378588e41a6ddc14db2