Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Integrate yardstick on daisy master branch"
  - Integrate yardstick on daisy master branch

    JIRA: DAISY-9

    1. Trigger yardstick job in daisy-baremetal-daily-master on zte-pod3
    2. Add daisy pods in yardstick
    3. Add EXTERNAL_NETWORK in installer params

    Change-Id: Ia8e69e503102c1fb282d6d2c5acac2ac3cbfe747
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 15d0c60..70dd6da 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 15d0c604dddaeb6471e3f1f4529b60e32b479582
+Subproject commit 70dd6da73b294c7d395354bc21aa1cd4be4bc966