Update git submodules

* Update docs/submodules/functest from branch 'stable/gambia'
  - Override tempest_conf.yaml in ci jobs

    It also removes STORAGE_PROTOCOL (env var) which was removed.

    Change-Id: Ib0f388f20c52ebf2409d2aca0bcba5c641287b40
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit e715a8309122c3fa3b4983cfa53c82519dd6ead7)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 26137f2..ed1d98d 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 26137f2765533a0df2f330fc78634866897abf20
+Subproject commit ed1d98d093d6d1428c5d14c5bb6de3ac21ec584e