Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Improved error handling when Energy recorder API is unavailable."
  - Improved error handling when Energy recorder API is unavailable.

    Log verbosity is reduced when API is discovered unavailable.
    Avoid next calls to API if unavailable at config loading.

    Change-Id: I68d169396335ae3891e4b808062058945fc2eca1
    Signed-off-by: Benoit HERARD <benoit.herard@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 7bd30cd..42877bb 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 7bd30cdc1e6d506bf1245daeb9d01530eab15674
+Subproject commit 42877bb48714293d3ec761f42007fcc8fa925724