Update git submodules

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