Add try catch for process kill. (#348)

Author: Vasil Hristov

core/utils/device/adb.py

@@ -59,7 +59,10 @@ def get_logcat(device_id):
             command_result = Adb.run_adb_command(command='logcat -d', device_id=device_id, wait=False)
             time.sleep(15)
             result = File.read(command_result.log_file)
-            os.kill(command_result.pid, 0)
+            try:
+                os.kill(command_result.pid, 0)
+            except OSError:
+                Log.info('Process already killed...')
         return result
 
     @staticmethod