v0.2.7: Update fields and add default value for bool type fields

1. Remove fields:VswitchID,WorkerInstanceType,WorkerDataDisk,WorkerDataDiskCategory,WorkerDataDiskSize,MasterInstanceType,MasterDataDisk,MasterDataDiskCategory,MasterDataDiskSize,PublicSlb
2. Add fields:WorkerInstanceTypes,WorkerVswitchIds,WorkerDataDisks,SecurityGroupId,MasterVswitchIds,MasterInstanceTypes,ResourceGroupID
3. Remove omitempty and add default value for bool type fields