Static CA, ADDomainExtension, and Get-AzureRoleSize cmdlets

Static CA cmdltes
- Get-AzureStaticVnetIP
- Set-AzureStaticVnetIP
- Remove-AzureStaticVnetIP
- Test-AzureStaticVnetIP

ADDomainJoin Extension cmdlets
- Get-AzureServiceADDomainExtension
- Set-AzureServiceADDomainExtension
- Remove-AzureServiceADDomainExtension
- New-AzureServiceADDomainExtensionConfig

Get-AzureRoleSize cmdlet