VirtualBox scripts calls ping incorrectly
VirtualBox scripts calls ping incorrectly

Fixed checking for Internet connectivity on the host computer,
fixed bug call ping utility with different arguments and under
different systems. Added check run docker container cobbler
on the master node.

Change-Id: If8a8862faca083f038d184e11c5a0d057eb91b56
Closes-Bug: #1412459

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