Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Remove Ceilometer test scenarios"
  - Remove Ceilometer test scenarios

    The API utilized by Rally in Ceilometer scenarios was deprecated in
    OpenStack Pike and scenarios were blacklisted. Remove these scenarios
    from respository.

    JIRA: FUNCTEST-949

    Change-Id: I6f100cdb18853d177fd88ea7bd539f9837914f25
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 750cf4b..3b543ff 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 750cf4bfef1553ac28dc6601911f79ecc54355f9
+Subproject commit 3b543ffedf283cef22e1bc3ad5c8cef147b80dde