Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 8b6d4ee2ffbfb11a1f9d494b2de403aab112cf93
  - Refactor ConfigurationRepositoryTest to remove the powermock.

    Refactor the ConfigurationRepositoryTest to doesn't affect to other tests.
    Removed powermock.

    Issue-ID: SDC-2473
    Signed-off-by: Krystian Kedron <k.kedron@partner.samsung.com>
    Change-Id: Iad67cdce365fef89da8b56499d86139d6927da07

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 6692cde..8b6d4ee 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 6692cde32bc3e588cfb6bf30fd99e21a903e0444
+Subproject commit 8b6d4ee2ffbfb11a1f9d494b2de403aab112cf93