AzureRT PR Sprint 32

VMImage:
* Update/Get-AzureVMImage
* New-AzureVMImageDiskConfigSet
* Set/Remove-AzureVMImageOSDiskConfig
* Set/Remove-AzureVMImageDataDiskConfig


ILB & Public IP:
* Add/Remove/Get-AzureInternalLoadBalancer
* New-AzureInternalLoadBalancerConfig
* Set/Get/Remove-AzurePublicIP


Reserved IP:
* New/Remove/Get-AzureReservedIP