Revert CycloneDDS compatibility change

Since we now send a HEARTBEAT on remote endpoint match, we can use the
PUSH_MODE without fear of "losing" messages with Cyclone DDS.

src/ros2/ros_package.vhd

@@ -773,7 +773,6 @@ package body ros_package is
         config.MAX_SAMPLES              := profile.HISTORY_DEPTH;
         config.MAX_INSTANCES            := profile.HISTORY_DEPTH;
         config.MAX_SAMPLES_PER_INSTANCE := profile.HISTORY_DEPTH;
-        config.PUSH_MODE                := FALSE; -- CycloneDDS compatibility
     end procedure;
     
     function gen_fqn(ns : string; node : string; name : string) return USER_STRING_TYPE is