Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: roles: create-vm-nodes: Always provision VM nodes"
  - xci: roles: create-vm-nodes: Always provision VM nodes

    The role used to get the output of 'virsh list --all' to determine how
    many VMs are present and shut off in the system. This takes *all* VMs
    on the system into consideration so it may skip creation of some or all
    of the XCI VMs if we happen to have other VMs present. We can improve
    the situation by simply dropping this check and always provision the
    VMs we want. If the VM is already present, then the module will simply
    do a sanity check of its configuration. This allows XCI to run alongside
    other VMs.

    Change-Id: I54255a1959509671c0305f48f23a55b6e900684f
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index ba0f4d7..e517f23 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit ba0f4d74ff7505055a1fd911fd40a760a3370baf
+Subproject commit e517f2332b0041b03bc936fc82743641357c0898