Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - globals/slave-params: Remove unused Fuel overrides

    Cleanup some unused parameter overrides, which were never in effect
    in the first place. For CI PODs, we inherit only installer specific
    parameters, so slave-label based overrides are ignored.

    PODs:
    - arm-pod5;
    - arm-virtual2;
    - ericsson-pod1;
    - lf-pod2;

    This reverts commit bb22c8c02df3e9d030ff64c304536c31b78a37a6.
    This reverts commit fc26623f9d7f211a9e29e246a2b13bdae5b3982b.

    Change-Id: Iee80ad8357f5126c4aa7510ed66ab6e79c20f3fc