Add flatdhcpmanager speific config options
Add flatdhcpmanager speific config options

Adding dhcp specific nova config params if the
network manager is set to dhcp.

This adds dhcp flat network support
nhinds/puppet-nova,aquto/puppet-nova,datacentred/puppet-nova,bodepd/puppet-nova,datacentred/puppet-nova,JioCloud/puppet-nova,cristifalcas/puppet-nova,mgagne/puppet-nova,dprince/puppet-nova,aimonb/puppet-nova,TelekomCloud/puppet-nova,balle/puppet-nova,apenney/puppet-nova,esteve/puppet-nova,mgagne/puppet-nova,arnaudmorinol/puppet-nova,nhinds/puppet-nova,larsks/puppet-nova,aquto/puppet-nova,JioCloud/puppet-nova,stratustech/puppet-nova,varunarya10/puppet-nova,pllopis/puppet-nova,ody/puppet-nova,varunarya10/puppet-nova,DylanYu/puppet-nova,aimonb/puppet-nova,esteve/puppet-nova,balle/puppet-nova,gwdg/puppet-nova,bodepd/puppet-nova,stratustech/puppet-nova,gwdg/puppet-nova,mgagne/puppet-nova,DarkHorseComics/puppet-nova,ody/puppet-nova,dprince/puppet-nova,javiplx/puppet-nova,aimonb/puppet-nova,apenney/puppet-nova,madkiss/puppet-nova