Update git submodules

* Update docs/submodules/yardstick from branch 'stable/euphrates'
  - Merge changes from topic 'euphrates-sync-2017-10-18' into stable/euphrates

    * changes:
      tc_heat_rfc2544_ipv4_1rule_1flow_64B_trex_correlated_scale_2: fix indent
      Hamonization of the titles of the documents (Testing group)
      scale-out testcase template

  - tc_heat_rfc2544_ipv4_1rule_1flow_64B_trex_correlated_scale_2: fix indent

    bad YAML indent

    Change-Id: I6aaf53b9bbf6005b6be4c2d6c69cefd41949f8c6
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
  - Hamonization of the titles of the documents (Testing group)

    Change-Id: I6065fb416a90544539316666aac92735ee84177a
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>
  - scale-out testcase template

    use anonymous flavors
    force num_vnfs to int

    added provider network examples

    we have to disable port security for provider networks

    removed vld_id, not needed

    adjust num_vfs to allocate two physnets per VNF.

    fix for multiports

    Change-Id: Ic4c8314dc07f6295b9559188989d81058bb48eb0
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index b581997..1addec1 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit b581997d49708b32096d62f863676fa9bfc2c834
+Subproject commit 1addec17ea56fa077b01c307e64343f69207bfe5