Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 66a5398f95f8c60a41ffa81f46ccee95beb34822
  - Work on unchecked Optional access
    
    - extract code to static methods
    - throw an explicit exception now if element not found
    
    Issue-ID: SDC-2987
    Signed-off-by: Chris Andre <chris.andre@yoppworks.com>
    Change-Id: I693bb53059b056235b567ac1f9f752a33512505a
    
diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 1803aa8..66a5398 160000
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 1803aa8530b53d9f22dc5815155dd3abdfd99b5a
+Subproject commit 66a5398f95f8c60a41ffa81f46ccee95beb34822