Update git submodules

* Update docs/submodules/openflowplugin from branch 'stable/carbon'
  to da844cbbfc249283dff814c475377819524b7f8d
  - Merge "Bug 7826 Identified the root cause for issue TransactionCommitFailed for group during statistic collection." into stable/carbon
  - Bug 7826
    Identified the root cause for issue TransactionCommitFailed for group during statistic collection.

    Change-Id: I687850125a1152df7646e013190ba63ab7cc79ac
    Signed-off-by: sunilkumarms <sunil.g.kumar@ericsson.com>

diff --git a/docs/submodules/openflowplugin b/docs/submodules/openflowplugin
index f5f97a55b0244b22d2f0e166d6aa0b1f2304c48c..da844cbbfc249283dff814c475377819524b7f8d 160000 (submodule)
--- a/docs/submodules/openflowplugin
+++ b/docs/submodules/openflowplugin
@@ -1 +1 @@
-Subproject commit f5f97a55b0244b22d2f0e166d6aa0b1f2304c48c
+Subproject commit da844cbbfc249283dff814c475377819524b7f8d