Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "decrease default hugepages,  depends on VNF of course"
  - decrease default hugepages,  depends on VNF of course

    Change-Id: I5e8d1461e158c0b499a8864099fbb218965a429f
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 0a24ca3..1098f36 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 0a24ca320c46c10a50d38b8eab6336eb0e32f8c9
+Subproject commit 1098f367fda7376e4b3a224b61857016e61524c1