Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: Remove jobs that belong to multisite

    Multisite project has been terminated.

    http://meetbot.opnfv.org/meetings/opnfv-meeting/2017/opnfv-meeting.2017-08-08-12.59.html

    Change-Id: Ia7c0bc86b2e8696f8c2f1fff3007d681c6e1cb8c
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 55ffe9a..fb0271b 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 55ffe9aead06fc13b885c5dd04a170856c35b3c9
+Subproject commit fb0271be568c4737f6ce6fa9d222ccee26c096ee