Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Merge configure-targethosts.yml playbooks into one"
  - xci: Merge configure-targethosts.yml playbooks into one

    They are exactly same now after moving nfs to compute00.

    Change-Id: I9d9d2f037aa3684ba130ae0a4f9aef2e733f2d2e
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 283f6dc..2f9aacf 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 283f6dcfbc101beb9ad85596f03c04529a7c0e61
+Subproject commit 2f9aacfdf788dc5ee5b38c2eb155c315ac758d17