commit c20e91ae9bc691604f98ee0837102b7a5578bd87
Author: zhoulinhui <df.some@foxmail.com>
Date:   Tue Oct 6 17:53:57 2020 +0800

    Update git submodules
    
    * Update os-api-ref from branch 'master'
      - Fix hacking min version to 3.0.1
    
        flake8 new release 3.8.0 added new checks and gate pep8
        job start failing. hacking 3.0.1 fix the pinning of flake8 to
        avoid bringing in a new version with new checks.
    
        Though it is fixed in latest hacking but 2.0 and 3.0 has cap for
        flake8 as <4.0.0 which mean flake8 new version 3.9.0 can also
        break the pep8 job if new check are added.
    
        To avoid similar gate break in future, we need to bump the hacking min
        version.
    
        - http://lists.openstack.org/pipermail/openstack-discuss/2020-May/014828.html
    
        Change-Id: I3433e903d2a1484d97c3eeed21955324fe8a33a9

diff --git a/os-api-ref b/os-api-ref
index ae88bef..859f766 160000
--- a/os-api-ref
+++ b/os-api-ref
@@ -1 +1 @@
-Subproject commit ae88bef00a595e880bd972f92648bde8a497cb98
+Subproject commit 859f766a2e67e543ee7030748d273418e55b7705