16.04 vcenter only:Provisioning failing for controller dockers

contrail-version: 4.1.0.0-50

smlite version: contrail-server-manager-installer_4.1.0.0-50~ocata_all.deb

The controller docker provisioning failing with the below error.

The setup is kept for debugging.Setup info at the end

Logs
----
<10.204.217.144> (0, '\r\n{"changed": true, "end": "2017-11-21 11:05:02.585944", "stdout": "", "cmd": "docker exec controller /usr/share/contrail-utils/provision_control.py --use_admin_api --host_name nodei28 --host_ip 10.204.217.140 --router_asn 64512 --oper add ", "rc": 1, "start": "2017-11-21 11:05:01.739610", "stderr": "Traceback (most recent call last):\\n File \\"/usr/share/contrail-utils/provision_control.py\\", line 225, in <module>\\n main()\\n File \\"/usr/share/contrail-utils/provision_control.py\\", line 221, in main\\n ControlProvisioner(args_str)\\n File \\"/usr/share/contrail-utils/provision_control.py\\", line 60, in __init__\\n use_admin_api=self._args.use_admin_api)\\n File \\"/usr/share/contrail-utils/provision_bgp.py\\", line 35, in __init__\\n api_server_use_ssl=self._api_server_use_ssl)\\n File \\"/usr/share/contrail-utils/vnc_admin_api.py\\", line 35, in __init__\\n auth_host=self.auth_host)\\n File \\"/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py\\", line 387, in __init__\\n self._discover()\\n File \\"/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py\\", line 677, in _discover\\n self._authenticate()\\n File \\"/usr/share/contrail-utils/vnc_admin_api.py\\", line 39, in _authenticate\\n sessions = self._api_server_session.api_server_sessions\\nAttributeError: \'VncApiAdmin\' object has no attribute \'_api_server_session\'", "delta": "0:00:00.846334", "invocation": {"module_args": {"warn": true, "executable": null, "_uses_shell": true, "_raw_params": "docker exec controller /usr/share/contrail-utils/provision_control.py --use_admin_api --host_name nodei28 --host_ip 10.204.217.140 --router_asn 64512 --oper add ", "removes": null, "creates": null, "chdir": null}}, "warnings": []}\r\n', 'Shared connection to 10.204.217.144 closed.\r\n')
failed: [10.204.217.144] (item={'key': u'10.204.217.140', 'value': u'nodei28'}) => {
    "changed": true,
    "cmd": "docker exec controller /usr/share/contrail-utils/provision_control.py --use_admin_api --host_name nodei28 --host_ip 10.204.217.140 --router_asn 64512 --oper add ",
    "delta": "0:00:00.846334",
    "end": "2017-11-21 11:05:02.585944",
    "failed": true,
    "invocation": {
        "module_args": {
            "_raw_params": "docker exec controller /usr/share/contrail-utils/provision_control.py --use_admin_api --host_name nodei28 --host_ip 10.204.217.140 --router_asn 64512 --oper add ",
            "_uses_shell": true,
            "chdir": null,
            "creates": null,
            "executable": null,
            "removes": null,
            "warn": true
        }
    },
    "item": {
        "key": "10.204.217.140",
        "value": "nodei28"
    },
    "rc": 1,
    "start": "2017-11-21 11:05:01.739610",
    "stderr": "Traceback (most recent call last):\n File \"/usr/share/contrail-utils/provision_control.py\", line 225, in <module>\n main()\n File \"/usr/share/contrail-utils/provision_control.py\", line 221, in main\n ControlProvisioner(args_str)\n File \"/usr/share/contrail-utils/provision_control.py\", line 60, in __init__\n use_admin_api=self._args.use_admin_api)\n File \"/usr/share/contrail-utils/provision_bgp.py\", line 35, in __init__\n api_server_use_ssl=self._api_server_use_ssl)\n File \"/usr/share/contrail-utils/vnc_admin_api.py\", line 35, in __init__\n auth_host=self.auth_host)\n File \"/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py\", line 387, in __init__\n self._discover()\n File \"/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py\", line 677, in _discover\n self._authenticate()\n File \"/usr/share/contrail-utils/vnc_admin_api.py\", line 39, in _authenticate\n sessions = self._api_server_session.api_server_sessions\nAttributeError: 'VncApiAdmin' object has no attribute '_api_server_session'",
    "stderr_lines": [
        "Traceback (most recent call last):",
        " File \"/usr/share/contrail-utils/provision_control.py\", line 225, in <module>",
        " main()",
        " File \"/usr/share/contrail-utils/provision_control.py\", line 221, in main",
        " ControlProvisioner(args_str)",
        " File \"/usr/share/contrail-utils/provision_control.py\", line 60, in __init__",
        " use_admin_api=self._args.use_admin_api)",
        " File \"/usr/share/contrail-utils/provision_bgp.py\", line 35, in __init__",
        " api_server_use_ssl=self._api_server_use_ssl)",
        " File \"/usr/share/contrail-utils/vnc_admin_api.py\", line 35, in __init__",
        " auth_host=self.auth_host)",
        " File \"/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py\", line 387, in __init__",
        " self._discover()",
        " File \"/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py\", line 677, in _discover",
        " self._authenticate()",
        " File \"/usr/share/contrail-utils/vnc_admin_api.py\", line 39, in _authenticate",
        " sessions = self._api_server_session.api_server_sessions",
        "AttributeError: 'VncApiAdmin' object has no attribute '_api_server_session'"
    ],
    "stdout": "",
    "stdout_lines": []
}

setup:
------
from fabric.api import env
import os

host1 = 'root@10.204.217.139'
host2 = 'root@10.204.217.140'
host3 = 'root@10.204.217.144'
host4 = 'root@10.204.217.204'
host5 = 'root@10.204.217.229'
esx1 = 'root@10.204.217.147'
esx2 = 'root@10.204.217.148'
host_build = 'stack@10.204.216.49'

if os.getenv('HA_TEST',None) == 'True':
    env.roledefs = {
        'all': [host1, host2,host3, host4, host5],
        'cfgm': [host1, host2,host3],
        'webui': [host1, host2,host3],
        'control': [host1, host2,host3],
        'collector': [host1,host2,host3],
        'database': [host1,host2,host3],
        'compute': [host4, host5],
        'build': [host_build]
    }
else:
    env.roledefs = {
        'all': [host1, host2,host3, host4, host5],
        'cfgm': [host1, host2,host3],
        'webui': [host1, host2,host3],
        'control': [host1, host2,host3],
        'collector': [host1,host2,host3],
        'database': [host1,host2,host3],
        'compute': [host4, host5],
        'build': [host_build]
    }
env.hostnames = {
    'all': ['nodei27', 'nodei28' ,'nodei32', 'nodei35-compute-vm', 'nodei36-compute-vm']
}