Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to a56df52cddd7d69140c38ca90bc4ce5168cbb0bd
  - Change OOM subchart deployment order

    Deploy the following subcharts first:
    aaf cassandra mariadb-galera dmaap

    Adjust liveness and readiness probe settings
    for cassandra to improve deployment speed.

    Turn on 3-node clustering for appc and sdnc.

    Issue-ID: INT-1055
    Signed-off-by: Gary Wu <gary.wu@futurewei.com>
    Change-Id: I13ce1e18241bf01630bc6a2beb488633de7a2f4b

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index ecd1ebd..a56df52 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit ecd1ebd52a0201ba3ab356cc23235e382a5419d8
+Subproject commit a56df52cddd7d69140c38ca90bc4ce5168cbb0bd