Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: get-opnfv-scenario-requirements.yml: Check if facts are set"
  - xci: get-opnfv-scenario-requirements.yml: Check if facts are set

    When the user selects an invalid combination then some facts may not be
    set so the deployment may fail in a crypt way like in the following case

    fatal: [localhost]: FAILED! => {"failed": true, "msg": "The conditional
    check 'deploy_scenario_installer' failed. The error was: error while
    evaluating conditional (deploy_scenario_installer):
    'deploy_scenario_installer' is undefined\n\nThe error appears to have been in
    '/home/opnfv/releng-xci/xci/playbooks/get-opnfv-scenario-requirements.yml':
    line 114, column 11, but may\nbe elsewhere in the file depending on the
    exact syntax problem.\n\nThe offending line appears to be:\n\n
    when: item.installer == XCI_INSTALLER\n        - set_fact:\n
              ^
    here\n"}

    Change-Id: I931376d99bb178b15c4a9a71d47b48b01b858e4e
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 862219c..e08ea41 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 862219cb61d57598029fc3dfe21923ccd00df257
+Subproject commit e08ea41d577b9b29d6fdc1ec1892bdbaf5fff680