Description of problem:
While Running an undercloud installation on Virtual machine the installation stop at the following step and do not continue:

Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/00-proxy.conf]/ensure: removed
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/01-cgi.conf]/ensure: removed
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/00-mpm.conf]/ensure: removed
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/00-systemd.conf]/ensure: removed
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/10-wsgi.conf]/ensure: removed
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/00-base.conf]/ensure: removed
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/00-lua.conf]/ensure: removed
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.modules.d/00-dav.conf]/ensure: removed
Notice: /Stage[main]/Nova::Cert/Nova::Generic_service[cert]/Package[nova-cert]/ensure: created
Notice: /Stage[main]/Nova::Db::Sync/Exec[nova-db-sync]: Triggered 'refresh' from 9 events
Notice: /Stage[main]/Nova::Cert/Nova::Generic_service[cert]/Service[nova-cert]/ensure: ensure changed 'stopped' to 'running'
Notice: /Stage[main]/Nova::Api/Nova::Generic_service[api]/Service[nova-api]/ensure: ensure changed 'stopped' to 'running'
Notice: /Stage[main]/Nova::Scheduler/Nova::Generic_service[scheduler]/Service[nova-scheduler]/ensure: ensure changed 'stopped' to 'running'
Notice: /Stage[main]/Nova::Conductor/Nova::Generic_service[conductor]/Service[nova-conductor]/ensure: ensure changed 'stopped' to 'running'
  

Version-Release number of selected component (if applicable):
instack-undercloud-2.2.7-4.el7ost.noarch

How reproducible:
Install undercloud in the following setup 
vm undercloud server and connected to vlan via trunk on host bridged via vswitch

Steps to Reproduce:
1. After setup the host and hosting VM with separated vlan.  
2. Setup undercloud.conf according to vlan IP network range and components passwords 
3. Run openstack undercloud install

Actual results:
The installation process "stuck" and do not end  

Expected results:
The undercloud installation process end with success or failure message  

Additional info: