Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 71b5dc0a3b445c64f1b6144c3f086128d88e4902
  - Make Cassandra port configurable add defaults.

    SDC-BE & Onboarding - BE.
    Reviewer: Evgenia A & Areli F.

    Change-Id: I4f11e354619a3f5cc276c128149a34f72c4b21bd
    Issue-ID: SDC-2077
    Signed-off-by: Tal Gitelman <tal.gitelman@att.com>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index c4d387d..71b5dc0 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit c4d387d216e72911f80c1ebee91b73aba191b91b
+Subproject commit 71b5dc0a3b445c64f1b6144c3f086128d88e4902