Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Merge "Replace glance client calls with openstack sdk"
  - Replace glance client calls with openstack sdk

    JIRA: SDNVPN-220

    This patch replaces all calls of glance client with openstack sdk.

    Change-Id: I8bf9913e3be9615c462791a20267e4dc71ffd727
    Signed-off-by: Stamatis Katsaounis <mokats@intracom-telecom.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index b804551..ae9dc48 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit b80455110aaaadafcd416b6a8e39467071cb6a62
+Subproject commit ae9dc4895258d200b6f7a90b389a5710ac271b33