Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 35ad4fe90a164b2d5c24be8aca08c1d80b92d692
  - [fuel] Enable Hunter jobs

    While at it:
    - drop obsolete Fraser branch jobs (they have been broken for a long
      time and running them on the same hardware with newer branch jobs
      is incompatible due to overlapping Docker networks);
    - schedule Hunter jobs;
    - schedule Hunter FDIO NOHA and K8-calico NOHA jobs during the weekend
      in the timeslot previously reserved for Fraser runs;

    Change-Id: I914376361da35b3918c9b1858f0b0fd400fb61a9
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>