Update git submodules

* Update docs/submodules/sdc/sdc-workflow-designer.git from branch 'master'
  to 8d870958cac0eaf35b5a99597bdcf8a9acfbd652
  - Bump version to 1.5.1
    
    Change-Id: I15f8ab906c3ae505cd3905234f6dfb05b58132a9
    Issue-ID: SDC-2560
    Signed-off-by: Ofir Sonsino <os0695@intl.att.com>
    
diff --git a/docs/submodules/sdc/sdc-workflow-designer.git b/docs/submodules/sdc/sdc-workflow-designer.git
index 1d5ecc6..8d87095 160000
--- a/docs/submodules/sdc/sdc-workflow-designer.git
+++ b/docs/submodules/sdc/sdc-workflow-designer.git
@@ -1 +1 @@
-Subproject commit 1d5ecc692a165fc84181b8f145242a410f2abf38
+Subproject commit 8d870958cac0eaf35b5a99597bdcf8a9acfbd652