Improve performance of the way how Xporter builds the mapping status from Xray issues

Context:
We should improve the way how Xporter builds the status mapping from Xray issues:

• TestExecution
• TestPlan

Solution:
We must have a new methodology on Xporter when we are building the mapping for the status (ex.: TestPlan Status):

• Field.ToDo.Percentage
• Field.ToDo.Count