Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "bug fix: installation of node, bower and grunt for reporting docker"
  - bug fix: installation of node, bower and grunt for reporting docker

     - change node installation process
     - clean setup (no need of pbr)

    Change-Id: I9015486e3892e7c949bad5140cc4180ec9f07aa7
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index cee97ae..82faf22 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit cee97aec2356f257c84e75c112de4f143d80859e
+Subproject commit 82faf22321aa1edb1b1b773b582ffb43d3fe2e3f