Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Refactor core VNF class"
  - Refactor core VNF class

    - Simplify processing
    - Implement run method to inherit testcase methods
    - Add unit tests
    - Fix all pylint issues

    It also obliges vnf and its uts to be rated 10/10 by pylint.

    JIRA: FUNCTEST-830

    Co-Authored-By: Cédric Ollivier <cedric.ollivier@orange.com>
    Change-Id: I8dd24eea55089277c9e5b2b51fb14dc377f2fcaf
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 7db24e2..fb3ef61 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 7db24e2b6994487d225c150a20f3a91d7bf12588
+Subproject commit fb3ef61a03cdf2fb938d771e9d23f6435cff240f