Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 56f75e6880006d2d1c612507a07c3aa7028814cb
  - Merge "[COMMON] Allow use of second Node Port Prefix"
  - [COMMON] Allow use of second Node Port Prefix

    OOM uses two node port prefix.
    Templates were not able to use the second one.
    This patch allows templates to use the second node port prefix and also
    to override on a per chart basis the value of the node port prefix.

    Issue-ID: OOM-1971
    Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
    Change-Id: I05f43e3dad93d6f0fbf575657ea41082e7c91053

diff --git a/docs/submodules/oom.git b/docs/submodules/oom.git
index 710dff6..56f75e6 160000 (submodule)
--- a/docs/submodules/oom.git
+++ b/docs/submodules/oom.git
@@ -1 +1 @@
-Subproject commit 710dff6a6041f2255b759a132b017a729ae65a1e
+Subproject commit 56f75e6880006d2d1c612507a07c3aa7028814cb