Create/Destroy the testing environment
1. Add the syslog appliance class to get the data from database in remote syslog
2. Add the test case of disconnecting the WLAN
1. Add the function of removing a specified wlan"
2. Enable/Disable remote syslog
Modify the remote syslog server ip
Check the syslog event
Merge from Perforce
Solve the conflict
Add new xid for test case