Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Add a warning of keypair creation"
  - Add a warning of keypair creation

    Put a warning if the public key already exist in OpenStack
    but the private key file is not found

    Change-Id: Ie2dc5b9f6a6abb0831e1826130d5c283cf3f34ec
    Signed-off-by: boucherv <valentin.boucher@orange.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 953c49e..e649bd8 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 953c49ee62d444c4c5f7f9c8d47c57e955129204
+Subproject commit e649bd8b445093963bba3b922f0cc762fcc011bc