HA provisioning with fab fails if config nodes in testbed.py are not is sequential order ( The chosen master node is not the first node)

testbed.py with failed configuration
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from fabric.api import env
import os
#Management ip addresses of hosts in the cluster
host1 = 'root@10.87.140.27'
host2 = 'root@10.87.140.48'
host3 = 'root@10.87.129.168'
host4 = 'root@10.87.129.59'
host5 = 'root@10.87.140.49'
#External routers if any
ext_routers = [('montreal', '10.87.140.140')]

#Autonomous system number
router_asn = 64512
public_vn_rtgt = 10000
public_vn_subnet = "10.87.129.224/27"

#Host from which the fab commands are triggered to install and provision
host_build = 'root@10.87.140.27'

#Role definition of the hosts.
env.roledefs = {
    'all': [host1, host2, host3, host4, host5],
    'cfgm': [host1,host2,host3],
    'openstack': [host1,host2,host3],
    'control': [host1,host2,host3],
    'compute': [host4,host5],
    'collector': [host1,host2,host3],
    'webui': [host1,host2,host3],
    'database': [host1,host2,host3],
    'storage-master': [host1,host2,host3],
    'storage-compute': [ host4, host5],
    'build': [host_build],
}

env.hostnames = {
    'all': [ 'cmbu-vxa20-15','cmbu-vxa22-19', 'cmbu-vxa20-2','cmbu-vxa22-9','cmbu-vxa20-4' ]
}
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During fab setup_all, the IPs got sorted and master node was chosen to be host3 10.87.129.168 and the VIP were assigned to this node

This led to following error
2015-05-14 18:38:37:837959: [root@10.87.129.59] out: [localhost] local: chkconfig supervisor-vrouter on
2015-05-14 18:38:37:838152: [root@10.87.129.59] out: [localhost] local: python /opt/contrail/utils/provision_vrouter.py --host_name cmbu-vxa22-9 --host_ip 13.0.0.5 --api_server_ip 13.0.0.7 --oper add --admin_user admin --admin_password n1keenA --admin_tenant_name admin --openstack_ip 13.0.0.7
2015-05-14 18:38:37:838274: [root@10.87.129.59] out: Traceback (most recent call last):
2015-05-14 18:38:38:171540: [root@10.87.129.59] out: File "/opt/contrail/utils/provision_vrouter.py", line 186, in <module>
2015-05-14 18:38:38:171698: [root@10.87.129.59] out: main()
2015-05-14 18:38:38:171791: [root@10.87.129.59] out: File "/opt/contrail/utils/provision_vrouter.py", line 182, in main
2015-05-14 18:38:38:171881: [root@10.87.129.59] out: VrouterProvisioner(args_str)
2015-05-14 18:38:38:171968: [root@10.87.129.59] out: File "/opt/contrail/utils/provision_vrouter.py", line 32, in __init__
2015-05-14 18:38:38:172056: [root@10.87.129.59] out: auth_host=self._args.openstack_ip)
2015-05-14 18:38:38:172143: [root@10.87.129.59] out: File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 200, in __init__
2015-05-14 18:38:38:172264: [root@10.87.129.59] out: retry_on_error=False)
2015-05-14 18:38:38:172361: [root@10.87.129.59] out: File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 404, in _request
2015-05-14 18:38:38:172450: [root@10.87.129.59] out: content = self._request(op, url, data=data, retry_after_authn=True)
2015-05-14 18:38:38:172564: [root@10.87.129.59] out: File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 429, in _request
2015-05-14 18:38:38:172653: [root@10.87.129.59] out: raise HttpError(status, content)
2015-05-14 18:38:38:172741: [root@10.87.129.59] out: cfgm_common.exceptions.HttpError: HTTP Status: 401 Content: Authentication required
2015-05-14 18:38:38:172826: [root@10.87.129.59] out:
2015-05-14 18:38:38:189702: [root@10.87.129.59] out: Fatal error: local() encountered an error (return code 1) while executing 'python /opt/contrail/utils/provision_vrouter.py --host_name cmbu-vxa22-9 --host_ip 13.0.0.5 --api_server_ip 13.0.0.7 --oper add --admin_user admin --admin_password n1keenA --admin_tenant_name admin --openstack_ip 13.0.0.7'
2015-05-14 18:38:38:189806: [root@10.87.129.59] out:
2015-05-14 18:38:38:189889: [root@10.87.129.59] out: Aborting.
2015-05-14 18:38:38:189954: [root@10.87.129.59] out: