Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Rename the deployment host to opnfv"
  - xci: Rename the deployment host to opnfv

    Reflect the changes to other impacted files as well.

    Change-Id: I106f4e47fe5c75d288f4878fe6ec9f8ff39c652e
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index ea2ec62..be291c9 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit ea2ec6273c995009e30e0d24f7b46e6530e6089c
+Subproject commit be291c9109c9e2e8d50db56dc8bb26373b0f51e6