Update git submodules

Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Fixing security group in CreateInstanceTwoNetTests"
  - Fixing security group in CreateInstanceTwoNetTests

    The test CreateInstanceTwoNetTests does define and create a security
    group and a corresponding rule but never associates them with the
    created instances. Moreover, some commercial systems require explicit
    egress rules in addition to ingress rules in order to allow traffic to
    pass. Anm egress rule has been added.

    JIRA: SNAPS-300

    Change-Id: Ie0da75781f8b4e97af11e4e7588c7a53acad59ac
    Signed-off-by: Georg Kunz <georg.kunz@ericsson.com>