SLA's export just consider 8hours/5days option

The SLA export must take into account the configurations that the customer adopts in his custom SLA: if 24/7 or 8/5. 
 
 Example:
1 102 937 000ms = 1 102 937s = 18 382m 17s = 306h 22m 17s
24/7
306h 22m 17s = 12d 18h 22m 17s = 1w 5d 22m 17s = Jira's SLA value
8/5
306h 22m 17s = 38d 2h 22m 17s = 7w 3d 22m 17s = Exported value