Update git submodules

Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Changed credentials for deploying heat templates."
  - Changed credentials for deploying heat templates.

    The old credentials had been working on other pods but are not working
    with our latest deployed by Kolla. This change does not affect any of
    the functionality included in the tests. It simply takes the administrative
    user credentials and changes the project to the newly created one.

    Change-Id: I76c605797b68f902f2ee5c679bd5b8a50c48a501
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>