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