Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Remove the constraint of INSTALLER_TYPE

    Revert the patch: https://gerrit.opnfv.org/gerrit/#/c/45167
    When run on non-opnfv deployment, there is no such concept of INSTALLER_TYPE.

    Change-Id: I3d420334c9329f7565cf22a0c314a4ffdb410d36
    Signed-off-by: Linda Wang <wangwulin@huawei.com>
    (cherry picked from commit 4d95f152cda9c7a44df13025341d3d7d472d57c6)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index b9cf2ac..068930b 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit b9cf2acb089fb39a3f1f77cf113779cab1acd235
+Subproject commit 068930b5b0a014dd569036f551ae164bbfec8d4d