Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 732768b2d0596e3e09e9788f033b488d349635bc
  - Added unit tests for AbstractStringPropertyConstraint

    Improved the unit test coverage in the package
    org.openecomp.sdc.be.model.tosca.constraints

    Issue-ID: SDC-2327
    Signed-off-by: Piotr Borelowski <p.borelowski@partner.samsung.com>
    Change-Id: I79c3ecaa6aae9b9c3011d332444b072d7c1dc460

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index b1eb291..732768b 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit b1eb291bf50b7aa15e5b1fc57c24f6a25a1b8fa5
+Subproject commit 732768b2d0596e3e09e9788f033b488d349635bc