Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Merge "Fix image name in rally scenarios" into stable/euphrates
  - Fix image name in rally scenarios

    Change-Id: I0a78a16d44c1e0e0b2edec2e43954c1f08e8bb09
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>
    (cherry picked from commit a9cb468fae75d4e95689fa9ea02a94a73df95648)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 56b09fd..1bd1a6c 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 56b09fd249484b2fa4485f4aba16c054ea8fa709
+Subproject commit 1bd1a6c1daed7f68ceb5cc46940061b663041d91