OBJECTIVE:
Force developers to select appropriate resolution during transition to Resolved state
STEPS:
1. Add new condition to the workflow transition
2. Select "Value Field - Allows to execute a transition if the given value of a field is equal to a constant value, or simply set."
3. Set condition as follows:
The field Resolution will have to be not equal to value 'NONE'. Compared as String.
I can still move issues to Resolved state with Resolution = NONE