Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Leverage on parser python packages in Dockerfile

    It also stops calling parser_install.sh.
    This file is replaced by the 2 new requirements in
    docker/thirdparty-requirements.txt:
      - tosca-parser
      - heat-translator

    Change-Id: Ic9dcdd81df9800fc8e559a07f9c100a20bea2290
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 9c969dc..63bce65 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 9c969dc408c2100f0106d9eb6466b58c421a287e
+Subproject commit 63bce65d3c20ce7b52396dbdf4c944da069ea0d7