mysql-standalone-server-ubuntu.json: autoUpgradeMinorVersion at wrong level

`mysql-standalone-server-ubuntu.json/azuredeploy.json` has

``` json
{
"publisher": "Microsoft.OSTCExtensions",
"type": "CustomScriptForLinux",
"typeHandlerVersion": "1.4",
"settings": {
"autoUpgradeMinorVersion": true,
"fileUris": [
"https://raw.githubusercontent.com/Azure/azure-quickstart-templates/master/mysql-standalone-server-ubuntu/install_mysql_server_5.6.sh"
]
},
"protectedSettings": {
"commandToExecute": "[concat('bash install_mysql_server_5.6.sh ', parameters('mysqlPassword'))]"
}
}
```

the `autoUpgradeMinorVersion` key should be one level above.

Open mysql-standalone-server-ubuntu.json/azuredeploy.json and compare the CustomScriptForLinux extension settings with the issue example. Move autoUpgradeMinorVersion to the level above settings, then validate that the JSON and ARM template remain valid.

Written by the indexing model from the issue text.