Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Revert "Temporarily switch to collivier/abot_charm"

    This reverts commit f837ff665a563430c693e47125dcc14fec2aec91.

    Change-Id: I40a862489247cf62ef8289652cab369c58da544d
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index f837ff6..0a0b300 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit f837ff665a563430c693e47125dcc14fec2aec91
+Subproject commit 0a0b3004284a1a68ccfcf76c653d7c879a74f81f