Bug 12577184: Update the docker extension to latest version (#269)

* VMSS Template for Linux extension and large scale.

* Resolving merge conflict.

* Fixed some names based on matching the functionality.

* VMSS Template Linux: Use an existing VNET and large scale.

* Fixing deleted file

* Update the docker extension to latest version.

101-vm-linux-apply-extension-docker/azuredeploy.json

@@ -21,7 +21,7 @@
       "properties": {
         "publisher": "Microsoft.Azure.Extensions",
         "type": "DockerExtension",
-        "typeHandlerVersion": "1.0",
+        "typeHandlerVersion": "1.2",
         "autoUpgradeMinorVersion": true,
         "settings": { },
         "protectedSettings": { }