Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Define logger as Feature instance attribute"
  - Define logger as Feature instance attribute

    It allows any Feature subclass to print warning messages in console
    and debug messages in a dedicated file.

    Co-Authored-By: Cédric Ollivier <cedric.ollivier@orange.com>
    Change-Id: Ic5b1b1184c16cf50f0baadc3904075d0acdf3c6d
    Signed-off-by: Jose Lausuch <jose.lausuch@ericsson.com>
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 063c8af..48db3a5 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 063c8af074a70b0b99c5c90c56d1fef541354192
+Subproject commit 48db3a575a737f957706f58ebdfc1851c3226b63