Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fully cover vnf"
  - Fully cover vnf

    clean() is now covered by unit tests.

    It must be noted that clean() doesn't warn about the possible
    failures when cleaning resources.

    Change-Id: If64c0cc5777ac5d2ce8a04ea34cd4f50091ab273
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 1d1550c..726cab1 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 1d1550c6e1277def386c1d8e2774ac7fac2d8d58
+Subproject commit 726cab11430b12f303cd4ab5d5d383d21bee5c9a