Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 96e3f714d9962f15ec3d2af43da1fc1e25f62f5e
  - Replace pip calls by the appropriate packages

    Change-Id: I415bb0742e84eda658672bcc7d54c704b509ece0
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a28ae3b..96e3f71 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a28ae3b44dff34d302e474d9135d2edc1efe5b36
+Subproject commit 96e3f714d9962f15ec3d2af43da1fc1e25f62f5e