Update git submodules

* Update docs/submodules/sdc/sdc-tosca.git from branch 'master'
  to be6b52d13ff94f39645b968237bae62982965033
  - Migrate sdc-sdc-tosca docs

    Merging this will create
    https://onap-sdc-sdc-tosca.readthedocs.io
    This build will run in parallel
    to the current docs generation method
    until we are ready to cut over.

    Issue-ID: CIMAN-364
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
    Change-Id: Id69de2eb2d8f0abaf076df5350901b548653212d

diff --git a/docs/submodules/sdc/sdc-tosca.git b/docs/submodules/sdc/sdc-tosca.git
index f96d68d..be6b52d 160000 (submodule)
--- a/docs/submodules/sdc/sdc-tosca.git
+++ b/docs/submodules/sdc/sdc-tosca.git
@@ -1 +1 @@
-Subproject commit f96d68dfcdd7d15b0ea04603bcf754bde8875036
+Subproject commit be6b52d13ff94f39645b968237bae62982965033