OperatingSytemSection and VirtualHardwareSection not given correct xml ns

`VMware_VCloud_API_OVF_VirtualHardwareSection_Type` and `VMware_VCloud_API_OVF_OperatingSystemSection_Type` are not correctly serialized when sending a request that includes `API_VmType`. The internal `namespace` arrays have been updated to make sure the ovf namespace is prefixed on the xml elements.