Update git submodules

* Update docs/submodules/snaps from branch 'stable/fraser'
  - Fix defaultbranch in .gitreview

    Change-Id: I23f3af46fcc84ce752b5797a0a8493ebd583565b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 1fc5ef2..1f70aa1 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 1fc5ef2345f9eab0236a251025aab8708b465b33
+Subproject commit 1f70aa1b7278b85ca585c8181522b61f10bc4e83