rhel-osp-director:   9.0 undercloud deployment fails: Error: Duplicate declaration: Sysctl::Value[net.ipv4.ip_nonlocal_bind] is already declared; cannot redeclare at /etc/puppet/modules/tripleo/manifests/loadbalancer.pp:960 on node instack.localdomain

Environment:
instack-undercloud-4.0.0-12.el7ost.noarch

Steps to reproduce:
1. Attempt to deploy the undercloud.

Result:
The undercloud deployment fails with:

Error: Duplicate declaration: Sysctl::Value[net.ipv4.ip_nonlocal_bind] is already declared; cannot redeclare at /etc/puppet/modules/tripleo/manifests/loadbalancer.pp:960 on node instack.localdomain
Error: Duplicate declaration: Sysctl::Value[net.ipv4.ip_nonlocal_bind] is already declared; cannot redeclare at /etc/puppet/modules/tripleo/manifests/loadbalancer.pp:960 on node instack.localdomain
+ rc=1
+ set -e
+ echo 'puppet apply exited with exit code 1'
puppet apply exited with exit code 1
+ '[' 1 '!=' 2 -a 1 '!=' 0 ']'
+ exit 1
[2016-08-17 16:30:57,400] (os-refresh-config) [ERROR] during configure phase. [Command '['dib-run-parts', '/usr/libexec/os-refresh-config/configure.d']' returned non-zero exit status 1]

[2016-08-17 16:30:57,400] (os-refresh-config) [ERROR] Aborting...
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 845, in install
    _run_orc(instack_env)
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 735, in _run_orc
    _run_live_command(args, instack_env, 'os-refresh-config')
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 406, in _run_live_command
    raise RuntimeError('%s failed. See log for details.' % name)
RuntimeError: os-refresh-config failed. See log for details.
Command 'instack-install-undercloud' returned non-zero exit status 1


Expected result:
Successfully deploy undercloud.