fix test

Author: huangpf

src/ServiceManagement/Compute/Commands.ServiceManagement.Test/FunctionalTests/ScenarioTest.cs

@@ -225,8 +225,15 @@ public void ProvisionLinuxVM()
 
             try
             {
-                vmPowershellCmdlets.NewAzureQuickVM(OS.Linux, newAzureLinuxVMName, serviceName, linuxImageName, "user",
-                                                    password, locationName);
+                Utilities.RetryActionUntilSuccess(() =>
+                {
+                    if (vmPowershellCmdlets.TestAzureServiceName(serviceName))
+                    {
+                        var op = vmPowershellCmdlets.RemoveAzureService(serviceName);
+                    }
+
+                    vmPowershellCmdlets.NewAzureQuickVM(OS.Linux, newAzureLinuxVMName, serviceName, linuxImageName, "user", password, locationName);
+                }, "Windows Azure is currently performing an operation on this hosted service that requires exclusive access.", 10, 30);
 
                 // Verify
                 PersistentVMRoleContext vmRoleCtxt = vmPowershellCmdlets.GetAzureVM(newAzureLinuxVMName, serviceName);