Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 15fabcb9618c6acd6fa604e17777df4d494eca1b
  - Fix impossible to drag and drop same service twice into the composition

    When a service proxy instance including underscore in its name is added into
    the composition, instance ID suffix is not properly calculated and that results
    in duplicate key error due to ID conflict.
    This change normalizes the name to find existing proxy instances to get suffix
    number calculated properly.

    Change-Id: I6f2ceb4b9cf020e1523264a99e1347b6caa98965
    Issue-ID: SDC-2043
    Signed-off-by: Satoshi Fujii <fujii-satoshi@jp.fujitsu.com>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index ee4c4d7..15fabcb 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit ee4c4d72ed2118ea44dd5d83e1cf1677b6ebb03c
+Subproject commit 15fabcb9618c6acd6fa604e17777df4d494eca1b