use collada_to_urdf under collada_urdf_jsk_patch instead of collada_tools

Use collada_to_urdf under collada_urdf_jsk_patch instead of collada_tools.
When this PR and https://github.com/jsk-ros-pkg/jsk_common/pull/420 are merged, https://github.com/start-jsk/rtmros_gazebo/issues/46 and https://github.com/start-jsk/rtmros_gazebo/issues/48 are resolved.