fix getRTCList only for stable RTC
fix .travis.sh for downstream test

 - add __init__.py to hrpsys_ros_bridge ( this should be fixed in current repo)
 - patch https://github.com/start-jsk/rtmros_common/pull/447 (stable rtc)
 - patch https://github.com/k-okada/hrpsys-base/commit/9ce00db.diff (stable rtc)
check all downlstream as default