Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "MaaS: DHCP iprange fix: use dynamic, not reserved"
  - MaaS: DHCP iprange fix: use dynamic, not reserved

    Without the 'type' parameter set to 'dynamic', MaaS was configured
    to reserve the IP range instead of allocating it dynamically.

    This led to IP exhaustion warnings in MaaS dashboard, as well as
    wrongful IP allocation.

    Change-Id: I1f2b90bf4cd2393cfab6d4bc17771cef009701c0
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>