Update git submodules

* Update docs/submodules/yardstick from branch 'stable/fraser'
  - Fix ansible scripts for running in container

    JIRA: YARDSTICK-1147

    Change-Id: I52dae85a2d97192bc8a48c5aeea3173b3d4de003
    Signed-off-by: John O Loughlin <john.oloughlin@intel.com>
    (cherry picked from commit 5db2f11d309d42cdf7cf177b86d31deb3fe58e37)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index b076105..266baa2 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit b07610535fc00ff02693942fca8b0a55995dc67e
+Subproject commit 266baa2694e397e2a449ba15d08046ef5baeab9a