GTNPORTAL-3519 BZ1117813 Reverted change of category's name from 854461f

You are not supposed to look at this now. I took the opportunity that you are in PTO to make this change :D 

Basically, I reverted this part because it caused issues with WSRP: when there's a local portlet named "my-little-portlet" and a remote portlet with the same name, an exception occurs when doing the "Import Applications" from the application registry, and it's caused by 854461f . The remaining of the commit is still there, but this particular line, responsible for the categories, had to be reverted. 

@vramik tested the WSRP bug, while @pmensik tested the ones that resulted in 854461f .