Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: Restrict virtualbmc to version 1.3

    Version 1.4 brings in additional dependencies and it's currently
    not used in OpenStack anyway. So lets stick to 1.3 for now.

    Change-Id: I2489168cae12f7fa3271c2de7d4fcf37bdb97810
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 53af7d3..45c9dee 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 53af7d33d81298017de732594cc3088b2f5fbeef
+Subproject commit 45c9deef6b77df5d77e37ac2b8f71f03cc0ac7a3