When ROS_LOCALHOST_ONLY=1 don't force multicast on lo (fix #158) #159
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This makes the bridge to follow the same behaviour than ROS 2 with
rmw_cyclonedds_cppwhenROS_LOCALHOST_ONLY=1: just make CycloneDDS to use127.0.0.1not forcingmulticast=true, and thus avoiding discovery issue with ROS Nodes that don't force multicast usage.See eclipse-zenoh/zenoh-plugin-ros2dds#12 (comment) for more details.