Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Remove print out of logger exception in TestUtils"
  - Remove print out of logger exception in TestUtils

    Remove print out of logger exception while executing
    "TestUtils.test_parse_ini_file_missing_section_header" test case.

    JIRA: YARDSTICK-1225

    Change-Id: I2a4e447c5d119fb9585b477d74f3d0a002c8278e
    Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 441dbee..8068adb 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 441dbeede14f08359959e08c85f0f2993483da61
+Subproject commit 8068adbf0aa5275f9c4cd4e298f1868834242e9a