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
Sriram, this feedback applies across the board for all cmdlets:
The output of the cmdlet must be a single object. We should be doing a single WriteObject - and not be emitting multiple strings like this.

Can we consistently follow this please.