Update hardcoded DNS server parameter in TestSingleNetworkInterfaceDnsSettings test case.

Author: zapepin

src/ResourceManager/Compute/Commands.Compute.Test/ScenarioTests/VirtualMachineNetworkInterfaceTests.ps1

@@ -163,7 +163,7 @@ function Test-SingleNetworkInterfaceDnsSettings
         $pubip = New-AzureRmPublicIpAddress -Force -Name ('pubip' + $rgname) -ResourceGroupName $rgname -Location $loc -AllocationMethod Dynamic -DomainNameLabel ('pubip' + $rgname);
         $pubip = Get-AzureRmPublicIpAddress -Name ('pubip' + $rgname) -ResourceGroupName $rgname;
         $pubipId = $pubip.Id;
-        $nic = New-AzureRmNetworkInterface -Force -Name ('nic' + $rgname) -ResourceGroupName $rgname -Location $loc -SubnetId $subnetId -PublicIpAddressId $pubip.Id -DnsServer "10.0.1.5";
+        $nic = New-AzureRmNetworkInterface -Force -Name ('nic' + $rgname) -ResourceGroupName $rgname -Location $loc -SubnetId $subnetId -PublicIpAddressId $pubip.Id -DnsServer "8.8.8.8";
         $nic = Get-AzureRmNetworkInterface -Name ('nic' + $rgname) -ResourceGroupName $rgname;
         $nicId = $nic.Id;