Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Adapt SFC testcases according to new Tacker API.

    - Update vnfd tosca templates

    JIRA: SFC-102

    Change-Id: I712b64e45c317582e0cb54e42364605f537aeee3
    Signed-off-by: Taseer Ahmed <taseer94@gmail.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 797f915..c6fcfca 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 797f9156bfe3fbbf6fb68b62b906799484d4bbc6
+Subproject commit c6fcfcaa891d0c7a1e63feeca675e64fdaf7cb40