Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Allow building functest-vnf via build.sh"
  - Allow building functest-vnf via build.sh

    Change-Id: I38c79028e642c6e3c8d64cc5eda1ead52983b12b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a6e8043..d96faa9 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a6e80436362806e3fff79da2baa1c68bf1ecf647
+Subproject commit d96faa96d834c6c1242f08daefb27580acf22f5c