Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - refstack client: improvement and fix of TestCase usage
    
    JIRA: FUNCTEST-772
    
    1, RefstackClientParser should not be a subclass of TestCase
    2, tempest_conf.py used for generating reference tempest.conf file
       not related to functest cmd, use logger is enough
    
    Conflicts:
        functest/opnfv_tests/openstack/refstack_client/refstack_client.py
    
    Change-Id: If9c37331a5a7687e5704e546efcdea8175b1529c
    Signed-off-by: MatthewLi <matthew.lijun@huawei.com>
    (cherry picked from commit 2f0b1281308cb494d83240eaa5137ca0524718b7)
    

1 files changed, 0 insertions, 0 deletions

diff --git a/docs/submodules/functest b/docs/submodules/functest
-Subproject 4c8649d84e861412888f625d006d88929ab868d
+Subproject 66331529e5e897873ff157c461259c3186be36e