Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix image paths in cloudify_ims_perf.yaml"
  - Fix image paths in cloudify_ims_perf.yaml

    Change-Id: If58b5f2021df8a0de672a30459b5b0b12f3fcef2
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 77f4c80..7e208b2 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 77f4c808d7cdf4321b7bdc9771d5bfa88da0dd15
+Subproject commit 7e208b21593d98b9b9600c7616b74f4cf4b3cfbf