Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to ad5771478017673ca17db20c1760d7015d5517dd
  - Merge "Removing duplicates from onap list"
  - Removing duplicates from onap list

    Removing from onap list duplicatated images which belongs to RKE

    Issue-ID: OOM-1847

    Change-Id: I5d8b2960c5225726401eefb95d1fe40e2c14f412
    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 04d2351..ad57714 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 04d235174c0d7f2d2a1d97b69b50772f7d075708
+Subproject commit ad5771478017673ca17db20c1760d7015d5517dd