Rename diff result keys #531

the output of a diff depending on the view look like the following

{'values_changed': [<root.status t1:"UP", t2:"DOWN">]}

{'values_changed': {'root.status': {'new_value': 'DOWN', 'old_value': 'UP'}}}

it would be great if it was possible to rename the keys for example

{'values_changed': [<root.status api:"UP", switch:"DOWN">]}

{'values_changed': {'root.status': {'switch': 'DOWN', 'api': 'UP'}}}

or better still have someway to I can create my own result