Move code to turn on/off BLF to separate function.
```Lua
presence_in.turn_lamp( toggle == "false",
call_flow_feature_code.."@"..domain_name,
call_flow_uuid
);
```
Close temp file in call_flow_monitor because on Windows it prevent to remove it.
Connect/release to database inside call_flow_monitor loop.
Check successful connection to database in call_flow_monitor loop so monitor did not crash
if connection temporary lost.
