Update git submodules

Update git submodules

* Update kubernetes/robot from branch 'master'
  to bc1480dc6c66d23ed04feaff93fca10da6a65a8f
  - Merge "Use global storage templates for PVC"
  - 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

    Issue-ID: OOM-1227
    Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
    Change-Id: Ie65e55bca92eb0ada674636f049ecb054b65c5da