Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Fix up tests for Parser scenario"
  - Fix up tests for Parser scenario

    * Check the results at the test methods
    * Remove print statement from Parser scenario
    * Replace assertEquals(x, True) with assertTrue(x)

    Change-Id: I5c2612692e625fc888c7ce7637b9e1625440724a
    Signed-off-by: Emma Foley <emma.l.foley@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 39c6a19..2a03d55 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 39c6a194fe2c3f97b4689d6eb5ef8feac11da685
+Subproject commit 2a03d55cb04027de507c47eed36577de41a869c7