Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Force unf_ext 0.0.7.4

    Else it cannot compile vs arm [1][2]

    [1] https://build.opnfv.org/ci/job/functest-vnf-docker-build-arm64-master/231/console
    [2] https://github.com/sile/unf/pull/2/commits/74ed3e3b1ec31474cf9b8d8a90aee535607fdfe8

    Change-Id: I8b0890c3b7a2a148975635c0f4eafbcc5568fc00
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 0c55898..e9b5f08 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 0c55898253147b8fb6e5ef1afbf6f462a5b343b5
+Subproject commit e9b5f08ddbdfefd6cbdf226a10b79b2349c4c86b