Description of problem:
Using packstack deploy openstack,when CONFIG_NEUTRON_OVS_BRIDGE_IFACES=br-eno50:eno50,encounters an error“ERROR : Error appeared during Puppet run: 10.43.241.186_neutron.pp ”.

Version-Release number of selected component (if applicable):
[root@controller200 ~]# rpm -qa | grep packstack
openstack-packstack-puppet-2014.2-0.15.dev1401.gdd19d48.el7ost.noarch
openstack-packstack-2014.2-0.15.dev1401.gdd19d48.el7ost.noarch


How reproducible:
1/1

Steps to Reproduce:
  yum install -y openstack-packstack 
  packstack --gen-answer-file=~/answers.cfg 

  cat ~/answers.cfg | grep CONFIG_KEYSTONE_ADMIN_PW | grep -v ^$ | grep -v ^# 
  sed -i 's/CONFIG_HEAT_INSTALL=n/CONFIG_HEAT_INSTALL=y/' ~/answers.cfg 
  sed -i 's/CONFIG_KEYSTONE_ADMIN_PW=d6f026eb28bc4ac6/CONFIG_KEYSTONE_ADMIN_PW=osp/' ~/answers.cfg 
  sed -i 's/CONFIG_CINDER_VOLUMES_CREATE=y/CONFIG_CINDER_VOLUMES_CREATE=n/' ~/answers.cfg 
  sed -i 's/CONFIG_NEUTRON_ML2_TYPE_DRIVERS=vxlan/CONFIG_NEUTRON_ML2_TYPE_DRIVERS=vlan/' ~/answers.cfg 
  sed -i 's/CONFIG_NEUTRON_ML2_TENANT_NETWORK_TYPES=vxlan/CONFIG_NEUTRON_ML2_TENANT_NETWORK_TYPES=vlan/' ~/answers.cfg 
  sed -i 's/CONFIG_NEUTRON_ML2_VLAN_RANGES=/CONFIG_NEUTRON_ML2_VLAN_RANGES=phvnet:100:200/' ~/answers.cfg 
  sed -i 's/CONFIG_NEUTRON_OVS_BRIDGE_MAPPINGS=/CONFIG_NEUTRON_OVS_BRIDGE_MAPPINGS=phvnet:br-eno50/' ~/answers.cfg 
  sed -i 's/CONFIG_NEUTRON_OVS_BRIDGE_IFACES=/CONFIG_NEUTRON_OVS_BRIDGE_IFACES=br-eno50:eno50/' ~/answers.cfg 
  sed -i 's/CONFIG_PROVISION_DEMO=y/CONFIG_PROVISION_DEMO=n/' ~/answers.cfg 

  

Actual results:
...
  10.43.241.186_neutron.pp:                         [ ERROR ]          
  Applying Puppet manifests                         [ ERROR ] 

  ERROR : Error appeared during Puppet run: 10.43.241.186_neutron.pp 
  Error: Duplicate declaration: Vs_bridge[br-ens34] is already declared in file /var/tmp/packstack/f441c89782684b79848481c0eb3f7b5b/manifests/10.43.241.186_neutron.pp:98; cannot redeclare at /var/tmp/packstack/f441c89782684b79848481c0eb3f7b5b/modules/neutron/manifests/plugins/ovs/bridge.pp:9 on node cephm186 
  You will find full trace in log /var/tmp/packstack/20150302-142444-EfhkSC/manifests/10.43.241.186_neutron.pp.log 
  Please check log file /var/tmp/packstack/20150302-142444-EfhkSC/openstack-setup.log for more information

Expected results:
should install successfully

Additional info: