Update git submodules

* Update docs/submodules/releng from branch 'master'
  to d77a45334371bcd8b0ddfa8b1062d5851a6670fc
  - Add tempest_slow in Functest gates
    
    It disables few ipv6 testcases due to possible SUT misconfigurations.
    It seems better than fully skipping ipv6 via tempest config [1]
    because it's already well covered in tempest_full.
    
    [1] https://docs.openstack.org/tempest/latest/sampleconf.html
    
    Change-Id: If1160dc68f5e53dffdfdd6722bdc557683243bde
    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 c9321951ce4e0ec2f378ad0cb89c71199a0306b
+Subproject d77a45334371bcd8b0ddfa8b1062d5851a6670f