新编写VirtualMaines.py中的9个自动化用例

ITC050101_GetVmsList、ITC050102_GetVmInfo、ITC05010301_CreateVm_Normal、ITC05010303_CreateVm_DupName、ITC05010304_CreateVm_NameVerify、ITC05010305_CreateVm_NoRequiredParams、ITC05010403_EditVm_DupName、ITC0501050101_DelVm_Normal_Down、ITC0501050102_DelVm_Normal_Up