Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 8cbef61dee77ba2a77120b9b512e4e6971fa2af9
  - Merge "Adding docker image list for 3.0.2"
  - Adding docker image list for 3.0.2

    New docker image list based on Casablanca MR 3.0.2-ONAP

    Issue-ID: OOM-1802

    Change-Id: Ic521cae2003299e1431c71750de9c603f07f9675
    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 323cc24..8cbef61 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 323cc24087033d2d63c3da4802771c32f18be504
+Subproject commit 8cbef61dee77ba2a77120b9b512e4e6971fa2af9