Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 8df11d420ff91a668960150ebc408e0c0733ce86
  - updating the VNFD (SOL001) type based on SOL001 v2.5.1

    updated VNFD types (tosca*.*nfv.) based on latest v2.5.1 version, not supported backward compatibility of SOL draft version, will be documented as limitation while upgrading from SOL draft version, updated importscript for new nodes, Also fixed java files for policyType having groupType reference, also updated with review comments

    Change-Id: I1e128098cd1ebd602fe5aa01e617363634b25148
    Issue-ID: SDC-2170
    Signed-off-by: sarada prasad sahoo <sarada.prasad.sahoo@huawei.com>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 1c9383b..8df11d4 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 1c9383bf85ce17e541fc1498a41a69568292b004
+Subproject commit 8df11d420ff91a668960150ebc408e0c0733ce86