Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to c78fe38ca9a3684d8ccd94c6b3101a1dee474b5b
  - sdc-backend-init docker container exits unsuccessfully with 404 error in importNormativeAll.py

    import of osca.policies.nfv.AffinityRule and tosca.policies.nfv.AntiAffinityRule getting failed at first attempt, comment execute , then un-comment execute it is working, strange issue

    Change-Id: Ia8799b4221b771ed34d61d09f87e2d9973861ebe
    Issue-ID: SDC-2231
    Signed-off-by: sarada prasad sahoo <sarada.prasad.sahoo@huawei.com>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 6896c1b..c78fe38 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 6896c1b309aaa50dca820169b9f1ae3f8af84294
+Subproject commit c78fe38ca9a3684d8ccd94c6b3101a1dee474b5b