Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "[centos jump] Add more missing required packages" into stable/euphrates
  - [centos jump] Add more missing required packages

    - gcc is required for NBD kernel module build;
    - gdisk is required for resizing rootfs in nbd-mounted chroot;

    Change-Id: I8863c126b75ce3a15998c03d2d159f53f5006f5d
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 59ced31f878c282fbeeaecfd0d29652b886882f8)