Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Add unit tests for doctor

    Change-Id: Iba3c63592623623507e009b0b9f514792c82d25e
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 4db57a5..999f45d 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 4db57a5fa786e9e209b428d4215b6033d15f1315
+Subproject commit 999f45ddb80899805293696dd2ff4627a63f73dd