Update git submodules

Update git submodules

* Update docs/submodules/snaps from branch 'stable/fraser'
  - Merge "New functionality for snaps-oo application." into stable/fraser
  - New functionality for snaps-oo application.

    1. Utility for saving a dict to a YAML file
    2. Added new hook that will create a file with the VMs created
       with the associated OpenStack credentials

    Change-Id: I124db00e4375603e9473cceab3e2846582d6cb22
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>
    (cherry picked from commit f9cf2eb23cb1dc22fe9d680ac49c8ed4d2aa6eff)