Update git submodules

Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Ensuring each port manipulation test waits for the instance to become active

    The problem with OpenStack is that when one attempts to delete an instance
    that is still spawning, it can take an inordinate amount of time for OpenStack
    to complete the request resulting in artifacts being left.

    JIRA: SNAPS-64

    Change-Id: I39f33291e650c00a8b5a40cb0051b99b71923acf
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>