Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 428dc0cd0ee1f847ea6f49b5a760926566d5c184
  - Fix unit tests
    
    Add asserts where required, fix tiny issues.
    
    Change-Id: Ie88a39642fd574745d9fa1f0eeee301ff8e19e23
    Issue-ID: SDC-2838
    Signed-off-by: Dmitry Puzikov <d.puzikov2@partner.samsung.com>
    
diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 1762cf5..428dc0c 160000
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 1762cf55e3fadd4daa986c67980813dc8afd8096
+Subproject commit 428dc0cd0ee1f847ea6f49b5a760926566d5c184