Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Force public identity endpoint in Shaker

    It conforms with our VNFs by calling public endpoints (from VM).
    It fixes by design the issues when testing Compass [1] due to
    export OS_INTERFACE=publicURL

    [1] https://build.opnfv.org/ci/view/functest/job/functest-compass-baremetal-daily-master/180/consoleFull

    Change-Id: Iea15506ba5910879d05e61cfd20da2c0878e569b
    Signed-off-by: Cédric Ollivier <ollivier.cedric@gmail.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index db459d3..7666aad 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit db459d327a9429ae9340cc95fc5287e218859813
+Subproject commit 7666aadc3d8b2075e001df55e5d2fd7389d765df