Update git submodules

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

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

    JIRA: SNAPS-207

    Change-Id: Id479b69c2b166ab38724c3886096d8483998f819
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 15b7270..5ccbf95 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 15b7270542288263189abebcfa4f89c0245aaf8b
+Subproject commit 5ccbf950eadbe54acad6e03cc43c19e05ee4e912