Merge From Perforce
Merge from Perforce
Add the test cases of band switch:
 1. Check band switch configuration in SZ.
 2. Switch AP radio band under zone.
 3. Switch AP radio band under AP group.
Add the Band Switch test cases:
1. Switch AP radio band when AP is under zone.
2. Switch AP radio band when AP is under AP group.
Define the WLAN name as a variable
Add the Band Balancing test cases:
1. Check default band balancing value.
2. Modify band balancing value.
3. Setup band balancing in zone while WLAN's enabling band balancing.
4. Setup band balancing in zone while WLAN's disabling band balancing.