Add config/config.yaml to set default configurations. Use the config/local_config.yaml to set the custom configurations Change-Id: I22049e478b6440c765751c8f17663f36f33c277a
add development guide Change-Id: Id8fcac77eb5691e297f99cfe845c1b53bf1709bf
add test guide Change-Id: I3194ff9cd846ded71852fff0ad20e56c383bf77a