Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "Rename variable OPNFV_SCENARIO to DEPLOY_SCENARIO"
  - Rename variable OPNFV_SCENARIO to DEPLOY_SCENARIO

    Rest of the OPNFV projects use the variable DEPLOY_SCENARIO so
    XCI should be aligned with them as well even though OPNFV_SCENARIO
    fits better than DEPLOY_SCENARIO.

    Change-Id: Id48c41fa8a1fa9493cfc7a4906f64b6d8ed27d64
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 460e629..8662864 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 460e629b50db8299e91f27216f2a5abd7995b425
+Subproject commit 8662864a166d9e89ba8058c871526b3ad94aae21