bluetooth_AdapterReboot tests failes due to the following reason

"["[--- failed: test_adapter_work_state ({'hci': True, 'is_powered_on': False, 'has_adapter': True})]"]"

Sample error log

08/23 12:52:05.992 ERROR|             utils:0286| [stderr] cat: /usr/local/autotest/.checksum: No such file or directory
08/23 12:52:56.826 ERROR|             utils:0286| [stderr] cat: /usr/local/autotest/.checksum: No such file or directory
08/23 12:53:14.923 ERROR|bluetooth_adapter_:0522| test_adapter_work_state: cannot concatenate 'str' and 'tuple' objects
08/23 12:53:14.924 ERROR|bluetooth_adapter_:0524| bluetoothd possibly crashed. Check out /var/log/messages.
08/23 12:53:15.039 ERROR|bluetooth_adapter_:0309| test_adapter_work_state failed at the 1st time.
08/23 12:53:25.765 ERROR|bluetooth_adapter_:0522| test_adapter_work_state: cannot concatenate 'str' and 'tuple' objects
08/23 12:53:25.765 ERROR|bluetooth_adapter_:0524| bluetoothd possibly crashed. Check out /var/log/messages.
08/23 12:53:25.918 ERROR|bluetooth_adapter_:0378| [--- failed: test_adapter_work_state ({'hci': True, 'is_powered_on': False, 'has_adapter': True})]
08/23 12:54:21.817 ERROR|             utils:0286| [stderr] cat: /usr/local/autotest/.checksum: No such file or directory
08/23 12:54:48.758 ERROR|             utils:0286| [stderr] cat: /tmp/sysinfo/autoserv-ohasoR/.checksum: No such file or directory