Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Remove Rally requests scenario"
  - Remove Rally requests scenario

    HttpRequests scenario is not directly related to OpenStack and not
    supported by Rally in https environment.

    Change-Id: I2e91d129d82dfaba62eca25e3e4890ff54f52ac6
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 19aabaa..b35ef0c 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 19aabaacbf55e3616545583f299de368a38e3c4f
+Subproject commit b35ef0cc9ba337bd46a2eb9d8d52854c80bb484a