Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 7be20b6c241f25b9845b448f1d65d97705634380
  - Merge "[POLICY] Use global storage templates for PVC"
  - [POLICY] Use global storage templates for PVC

    OOM has now templates in order to create the needed PVC, using:

    * a PV with a specific class when using a common nfs mount path between
    nodes (sames as today use) --> is the default behavior today
    * or a storage class if we want to use dynamic PV.
      On this case, we use (in order of priority):
      - persistence.storageClassOverride if set on the chart
      - global.persistence.storageClass if set globally
      - persistence.storageClass if set on the chart

    Change-Id: Iabd5d12196459bb1fce9021857aeab57a757ee12
    Issue-ID: OOM-1227
    Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>