Add support for pxe+nfs install of master node
Add support for pxe+nfs install of master node

Change-Id: I4f5eb0ce2a9352eb8692d6abd68296042f561224

AnselZhangGit/fuel-main,Fiware/ops.Fuel-main-dev,dancn/fuel-main-dev,zhaochao/fuel-main,teselkin/fuel-main,dancn/fuel-main-dev,SmartInfrastructures/fuel-main-dev,AnselZhangGit/fuel-main,SergK/fuel-main,stackforge/fuel-main,SmartInfrastructures/fuel-main-dev,ddepaoli3/fuel-main-dev,stackforge/fuel-main,SmartInfrastructures/fuel-main-dev,ddepaoli3/fuel-main-dev,zhaochao/fuel-main,eayunstack/fuel-main,ddepaoli3/fuel-main-dev,huntxu/fuel-main,stackforge/fuel-main,Fiware/ops.Fuel-main-dev,dancn/fuel-main-dev,huntxu/fuel-main,ddepaoli3/fuel-main-dev,SmartInfrastructures/fuel-main-dev,zhaochao/fuel-main,teselkin/fuel-main,SergK/fuel-main,eayunstack/fuel-main,zhaochao/fuel-main,eayunstack/fuel-main,teselkin/fuel-main,SergK/fuel-main,huntxu/fuel-main,teselkin/fuel-main,AnselZhangGit/fuel-main,dancn/fuel-main-dev,Fiware/ops.Fuel-main-dev,AnselZhangGit/fuel-main,zhaochao/fuel-main,Fiware/ops.Fuel-main-dev