mgmt, design, sample for beginCreate VM

[weidongxu-microsoft]

Some user need to batch create large numbers of VM.

Would like a sample to demonstrate alternative to polling.

Consider:

1. create dependency resources like network (may include NIC, or not)
2. use virtualMachines().define(...)....beginCreate() on VM (5 to 10)
3. use Azure Resource Graph (or list, is having problem publish the sample with ARG) to batch query the status (the number of provisioningState=Succeeded ?).