Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Supporting the protocol string value of 'any' for security group rules."
  - Supporting the protocol string value of 'any' for security group rules.

    This issue had been found by Stuart Mackie when using OpenContrail.

    Change-Id: I5b57773e19c20028ac736521d461d49341c78cb0
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index a822098..6d6a6d7 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit a82209830309354c5bdc7e8b885c51df42c731d1
+Subproject commit 6d6a6d72ca1050525010bbb9c2569b85e050ad62