Update git submodules

* Update docs/submodules/yardstick from branch 'stable/fraser'
  - Merge "Stop running tests from tests/unit" into stable/fraser
  - Stop running tests from tests/unit

    Since all tests have been moved into yardstick/tests,
    temperary code to run tests in both tests and yardstick/tests
    should be removed.

    JIRA: YARDSTICK-837
    Change-Id: I3bf3c9ece9bc8457d992e53ee8cc5cadb1dec8f0
    Signed-off-by: Emma Foley <emma.l.foley@intel.com>
    (cherry-picked from commit 64add9a435e9455b3bff6971d2717857cdce8193)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 441d5f5..70ea01b 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 441d5f55a6e2e155d01d4b396678d0d09bfb8413
+Subproject commit 70ea01b882a5ff61a36f8927d64d1bf3b9446838