Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Remove cloudify_ims_perf

    All that modules are uncovered, unverified and deprecated.
    They will be safely reverted as soon as they are updated, verified by
    gates and unit tests are added.

    Change-Id: Iac0893f9f0ccb485d91cd17305e744aff9bf9414
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index ef07bda..cd8edb7 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit ef07bda783fe6fed0c55634e19df95d72338010d
+Subproject commit cd8edb720d2e72842c35e9d6271fc81e6717679d