LPS-31325 WCM - DDM Upgrade process

Hi Bruno! I remembered I had some code worth reusing. 
Maybe you have already implemented some part of it, but anyways, here it is. 
It's basically the moving of all records from JournalTemplate and JournalStructure to DDMTemplate and DDMStructure. 
Discard whatever you don't need. 
Thanks, guys!
Juan 

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