Provide new XMLParser method parseTagList

[rsoika]

Add an additional static method to parse a tag list into a ItemCollection list with the following xml structure:

     <code>	  
        <modelversion>1.0.0</modelversion>
         <task>1000</task>
         <event>10</event>
      </code>
      <code>	  
         <modelversion>2.0.0</modelversion>
         <task>2000</task>
         <event>20</event>
      </code>

The call

 officeTemplateConfigList = XMLParser.parseTagList(workflowResult, "wopi-template");

should return a List with two ItemCollections each with 3 items (modelversion, task and event)