Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Added method to OpenStackHeatStack to return OpenStackFlavor objects.

    Continuation of the story SNAPS-153 for adding creator/state machine
    instances for OpenStack objects deployed via Heat.

    JIRA: SNAPS-174

    Change-Id: I791e427efc487045c0f72cd836dabd9a66a4f60f
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 85eb362..b20a368 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 85eb362579efbbc57e2851b2da2fd9599461f1ae
+Subproject commit b20a368daa581e3f649ac5a772da31cd09fdb484