Update git submodules

Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Test groups are deleted after ovs reconnection

    Create a new testcase (Testcase 11)

    Testing procedure:
    Create a Network with 2 VMs so that a group is added
    to ovs. Disconnect ovs. Remove the Network and the VMs.
    Connect ovs again. Check that the group is deleted from
    it.

    JIRA: SDNVPN-151

    Change-Id: I4c6f5e16f837bbcc589cbbbf05896a2d17b9cd57
    Signed-off-by: panageo2 <panageo@intracom-telecom.com>
    Signed-off-by: Periyasamy Palanisamy <periyasamy.palanisamy@ericsson.com>