Description of problem:
Te data mapper is putting special characters (like urls) escaped in the process XML (but since they are in a CDATA section they shouldn't).

Example:

Put into a constant for an Input Assignment in the data mapper: http://api.zippopotam.us/us/{zip}

Stored in XML: http%3A%2F%2Fapi.zippopotam.us%2Fus%2F%7Bzip%7D

Version-Release number of selected component (if applicable):
6.3.0.Final Community

How reproducible:


Steps to Reproduce:
1. Create a BP with a User Task
2. Add a data input to the task
3. Assign the constant http://api.zippopotam.us/us/{zip} to the input
4. View the process BPMN2 - the URl is URLEncoded in a CDATA section