Update git submodules

* Update docs/submodules/oom.git from branch 'elalto'
  to 1ba556dfafe98d298630d997251de8331528d975
  - [POLICY] new elato images

    New images are needed in ElAlto since some components
    did not support external certificate configuration.

    Update license headers to 2020

    Issue-ID: POLICY-2519
    Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
    Change-Id: Id5b395d28fda6b60c06ebec818068fad204310eb
    Signed-off-by: jhh <jorge.hernandez-herrero@att.com>

diff --git a/docs/submodules/oom.git b/docs/submodules/oom.git
index bd69b01..1ba556d 160000 (submodule)
--- a/docs/submodules/oom.git
+++ b/docs/submodules/oom.git
@@ -1 +1 @@
-Subproject commit bd69b018a250990a6923b0d74c7a573d2e3e6b2c
+Subproject commit 1ba556dfafe98d298630d997251de8331528d975