Description of problem:

Running packstack --allinone on a fresh and up to date CentOS6 installation I receive:

"""
Applying 192.168.122.152_neutron.pp
192.168.122.152_neutron.pp:                       [ ERROR ]           
Applying Puppet manifests                         [ ERROR ]

ERROR : Error appeared during Puppet run: 192.168.122.152_neutron.pp
Error: sysctl -p /etc/sysctl.conf returned 255 instead of one of [0]
You will find full trace in log /var/tmp/packstack/20140914-225857-OebbrQ/manifests/192.168.122.152_neutron.pp.log
Please check log file /var/tmp/packstack/20140914-225857-OebbrQ/openstack-setup.log for more information
"""

Running `sysctl -p /etc/sysctl.conf` myself I receive:

"""
sysctl -p /etc/sysctl.conf
net.ipv4.ip_forward = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key
error: "net.bridge.bridge-nf-call-iptables" is an unknown key
error: "net.bridge.bridge-nf-call-arptables" is an unknown key
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
"""

I manually removed the errant lines and re-ran packstack but it added them back and encountered the same error.

Version-Release number of selected component (if applicable):

openstack-packstack-2014.1.1-0.28.dev1238.el6.noarch

How reproducible:

Every time.

Steps to reproduce:

1. Install CentOS 6.5.
2. Add EPEL repository.
3. Add RDO repository.
4. Yum update.
5. Install openstack-packstack
6. Run packstack --allinone