Adding WAPackIaas support for VMRole et Networking

Adding new cmdlets along with their respective unit tests, functional tests, and documentation. 

**New cmdlets**
Get-WAPackCloudService
Get-WAPackLogicalNetwork
Get-WAPackStaticIPAddressPool
Get-WAPackVMRole
Get-WAPackVMSubnet
New-WAPackCloudService
New-WAPackStaticIPAddressPool
New-WAPackVMRole
New-WAPackVMSubnet
New-WAPackVNet
Remove-WAPackCloudService
Remove-WAPackStaticIPAddressPool
Remove-WAPackVMRole
Remove-WAPackVMSubnet
Remove-WAPackVNet
Set-WAPackVMRole