OK Guys before leaving to vacation got chance to make this. Here is the procedure, follow to the letter.
I am about to leave for vacation so coudn't test it, but already tested and reported by @mrtipster49
1.First Flash Complete ROM N7100XXUEMJ5 from sammobile posted here
Now your device will have KNox enabled bootloader.
2.Download MJ5BLPatch.tar.md5 and Flash with Odin for PDA Tab.
3.Reboot device, You won't have wifi working.
4.Download wifi patch and flash with Odin for PDA tab.
5.Reboot device and you will have old Knox free bootloader with Wifi working.
6.Flash CWM Recovery
7.To root device Use my MultiTool. You have to download MultiTool advanced V5 for 4.3 from this post I am uploading right now.
Once you root with this tool, It also remove KNOX apps from device.
8.Don't open SuperSU but straight way go to play store and update SuperSU
9.Now everything should be fine.
Sorry guys, Tomorrow I am leaving so can't support for 10 days, I request senior members to handle the thread and help newbies.