Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 7722459d0afef7822b7b66131eb9cb064d47a1d8
  - Remove Clover docker builds

    Change-Id: I2163eb971b9cbd033316e4a998a77b283891125c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 75d5154..7722459 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 75d515484e188a0cd4772e8acfd8087be9740de2
+Subproject commit 7722459d0afef7822b7b66131eb9cb064d47a1d8