Importing, displaying Vault settings, framework for Gets

This change set includes Importing vault settings and displaying the same and getting list of cloud services. Also framework for GETs is ready.

Import cmdlet allows piping, example usage is here:
PS C:\> $resourceName = "resourceName"
PS C:\> $cloudServiceName = "cloudServiceName"
	
PS C:\> Get-AzureSiteRecoveryVaultSettingFile -ResourceName $resourceName -CloudSeriveName $cloudServiceName | Import-AzureSiteRecoveryVaultSetting
Comment for all the Model files. If you are copying them from Hydra, they should be under the 'Generated' folder, right?

In general, please seperate out all your changes from the code copied from Hydra