Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Rename test_ims_base.by to test_ims_base.py

    It fixes errors when importing modules too.
    It completes the review "Added test case for opera vims" [1].

    [1] https://gerrit.opnfv.org/gerrit/#/c/30681

    Change-Id: Ib3cf9c66eb9a2c25ff4fb58d48e4b15a44556f7c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 5f89094..ccc675b 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 5f8909471e460c9ff519162fcc97895d3d93a9ff
+Subproject commit ccc675b3095271d59dba3a49c0b116d0ff6c6bfb