Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Remove odl_netvirt testcase

    Its dendencies have not been met since Danube [1].

    [1] https://build.opnfv.org/ci/job/apex-os-odl_l3-nofeature-noha-baremetal-danube/

    Change-Id: I1a5bb4acd9e7e14dbf519132847521b5138f4cd6
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 38c6739..13e4c58 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 38c67396839738cb319c797aa35fb50ec892b053
+Subproject commit 13e4c5838b732bf9fd246cd4f97cb9b4e2b8e0b9