Update git submodules

* Update oslo.config from branch 'master'
  to 97776b8ebf8a1789768c565dff0ff7555d6ec7b2
  - docs: Remove cruft from config files

    Change-Id: Ic31fc50d115f3f905ac7fc8b819b747a160da38e
    Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

diff --git a/oslo.config b/oslo.config
index 062cb883b43054b70c0c3a56cbccc2fcc355df5b..97776b8ebf8a1789768c565dff0ff7555d6ec7b2 160000 (submodule)
--- a/oslo.config
+++ b/oslo.config
@@ -1 +1 @@
-Subproject commit 062cb883b43054b70c0c3a56cbccc2fcc355df5b
+Subproject commit 97776b8ebf8a1789768c565dff0ff7555d6ec7b2