Update git submodules

Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Refactor network retrieval API calls."
  - Refactor network retrieval API calls.

    Refactored neutron_utils#get_network() to also accept a
    NetworkSettings object for more robust queries in addition to
    the old network_name parameter. Also refactored neutron_utils#
    get_network_by_id to add in the ID to list_networks((**{'id': id)
    and returning the first item contains the expected ID value.

    JIRA: SNAPS-161

    Change-Id: Ie670a442dd70633bbef7a1233e630672ebac6b0c
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>