add timeout to kmlsync wait_for_service
add timeout to kmlsync wait_for_service

Instead of hanging forever, this will raise an exception at the end of
the timeout and kill the ros node.

EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes