Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 55b436677e4991b5de509cf5d5d8da0f857964bb
  - Add support for multiple lists in nexus blob build

    Because of separated lists for onap, rke or rancher adding possibility
    to pass multiple lists to build_nexus_blob.sh as parameters

    Issue-ID: OOM-1890

    Change-Id: Ib5aa8489b612dfd6099116695b4ccc3be49a82bd
    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 23b8ca3..55b4366 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 23b8ca32cbc95021ef194918ab48567df398ff1f
+Subproject commit 55b436677e4991b5de509cf5d5d8da0f857964bb