Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to e9cb7eb287f88938b0a2f6d2cd0743e6ac2867f8
  - Cleaned up ArtifactValidatorExecuter and IArtifactValidatorExecutor

    This commit intends to clean the tests related to ArtifactValidatorExecuter and IArtifactValidatorExecutor by introducing the concept of test contract. Some renaming have to be done to fix the typo in Executer (it should be named Executor), hence the number of changes.

    Signed-off-by: Francis Toth <francis.toth@yoppworks.com>
    Change-Id: I5cd4512c425ae01f4f1118c9d61e6fce3df94f1d
    Issue-ID: SDC-2499

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 6bd3d3a..e9cb7eb 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 6bd3d3a85c4e14174070b8c0de81714a0155255a
+Subproject commit e9cb7eb287f88938b0a2f6d2cd0743e6ac2867f8