Add wait for nodes to get online state after upgrade
Add wait for nodes to get online state after upgrade

- Add wait for nodes to get online state after upgrade
to prevent OSTF failure

Change-Id: Ie9714eed49aea7aa6ae06fa9e6285796e070b8fd
Closes-Bug: #1398825

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