Datasource template configuration

Tom added support in the EAP installer to generate a best practice template based on the configurations listed in

https://access.redhat.com/documentation/en-US/JBoss_Enterprise_Application_Platform/6.3/html/Administration_and_Configuration_Guide/sect-Example_Datasources.html

I think we need something similar in the web console when adding a datasource - e.g. in the 2nd wizard screen there is a drop-box with a template name:

• PostgreSQL
• MySQL
• ...
• Custom

which will help to predefine the values in the best practice template.

So, after the wizard is done the configuration must be similar to the one described in the EAP guide.