Improve code quality of output_template

[hadusam]

No tests

There is no tests for output_template/python except run.py of e2e test. It is better to add tests as well as other python files (e.g. under blueoil/).

Redundant codes

usb_camera_demo.py and motion_jpeg_server_from_camera.py are demo scripts and internal logic is similar but there are redundant implementation about visualization and measure inference time(fps). And run.py has also function to measure inference time. I think there is some better way to improve readability of these codes.