Support Dasv4-series with premium disk (#340)

Author: timja

src/main/java/com/microsoft/azure/vmagent/AzureVMAgentTemplate.java

@@ -1479,7 +1479,7 @@ public ListBoxModel doFillStorageAccountTypeItems(@QueryParameter String virtual
             model.add(SkuName.STANDARD_LRS.toString());
 
             /*As introduced in Azure Docs, the size contains 'S' supports premium storage*/
-            if (virtualMachineSize.matches(".*_[a-zA-Z]([0-9]+[Mm]?[Ss]|[Ss][0-9]+).*")) {
+            if (virtualMachineSize.matches(".*_[a-zA-Z]([0-9]+[aAMm]?[Ss]|[Ss][0-9]+).*")) {
                 model.add(SkuName.PREMIUM_LRS.toString());
             }
             return model;
@@ -1494,7 +1494,7 @@ public ListBoxModel doFillOsDiskStorageAccountTypeItems(@QueryParameter String v
             model.add(DiskSkuTypes.STANDARD_SSD_LRS.toString());
 
             /*As introduced in Azure Docs, the size contains 'S' supports premium storage*/
-            if (virtualMachineSize.matches(".*_[a-zA-Z]([0-9]+[Mm]?[Ss]|[Ss][0-9]+).*")) {
+            if (virtualMachineSize.matches(".*_[a-zA-Z]([0-9]+[aAMm]?[Ss]|[Ss][0-9]+).*")) {
                 model.add(DiskSkuTypes.PREMIUM_LRS.toString());
             }
             return model;