Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Set scp debug flag in juju_epc

    Change-Id: Ic57d05416ac7c8bc459363ea479237101c22f27e
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit ed3a825ec90796fe72387b4bd74033a991b2351b)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a52502c..da20f16 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a52502ca91e15bcdfa280e15601c53a62d365cd6
+Subproject commit da20f16245506140b0912dd9580171f3c2c0dd96