Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "Reduce no of cpus allocated per node"
  - Reduce no of cpus allocated per node

    Change-Id: I62c167621e2b28a57b1ef7647d105ea73dbb0291
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 3aae4a1..bb7e7ef 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 3aae4a146649595359bc517c1c8cbb7cfec898ec
+Subproject commit bb7e7efef45d8347c08022c7246d6111887b864d