Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 968cd1f0e8a4b5487933d1e7c2d0049720464d8c
  - Add support for HTTPS in sanity tests

    If 'disableHttp' is enabled then HTTP ports are replaced with HTTPS ports.
    Also added the latest trustore with AAF issuer. And because certs for SDC
    components have CN set to "sdc" - environment json must have the domain
    names correctly too...it will not work with plain IPs.

    The changes have been tested from CSIT perspective so if something is
    missing here or wrong then it is due to the fact that I was focusing on
    bringing https support to the same level as are http tests and there is
    also the fact that I do not know SDC component at all.

    The changes are also done in a manner of previous ones - hacked on top of
    the current codebase, which is in dire need of a rewrite:

    - duplicated trustores and other artifacts
    - duplicated scripts and/or similar script with small differences
    - ui tests use old ubuntu image vs api tests on alpine
    - chef codebase is very messy and I see no benefit in the current usage

    Issue-ID: SDC-2564

    Signed-off-by: Petr Ospalý <p.ospaly@partner.samsung.com>
    Change-Id: I32e0fb7723ab8489eb09372d410c6f34aaf7cfc8

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 5fb549c..968cd1f 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 5fb549c2847fe5dfdb06019e136913cd0aeea0e9
+Subproject commit 968cd1f0e8a4b5487933d1e7c2d0049720464d8c