Update git submodules

* Update docs/submodules/releng from branch 'master'
  to e1f021c2d45e25e1ab13637f410d325f934bcd15
  - Try to get best parallel testing values
    
    It's no simple to get the best threads (test cases and tempest) values
    and then guarantee Functest vs:
      - test flapping
      - backend limitations
    
    As opposed to the OpenStack gates, Jenkins runs all test cases in
    parallel which indirectly increases the number of threads.
    
    Let's run smoke sequentially which is closed to the OpenStack model.
    
    Change-Id: I6172568b915d49e2723173b7c428970110f63620
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    

1 files changed, 0 insertions, 0 deletions

diff --git a/docs/submodules/releng b/docs/submodules/releng
-Subproject e3d698634d0d751ebd4d9701c134af03bb5852b
+Subproject e1f021c2d45e25e1ab13637f410d325f934bcd1