Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - pylint: make Jenkins output parseable

    Jenkins doesn't handle the color and the output is hard to read in
    Jenkins logs

    Change-Id: Ie8fc5a78e89f72c829e4bbbcbd1291a723dfde72
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 94d3b53..5702f5b 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 94d3b53e1e079a6f0b2ec1e5106e19067a0c00a9
+Subproject commit 5702f5b5e0721d9af61e494691376f32652e0048