Bump jmxtrans-agent to 1.2.4
Bump jmxtrans-agent to 1.2.4

jmxtrans/jmxtrans-agent,dd00f/jmxtrans-agent,jmxtrans/jmxtrans-agent,cyrille-leclerc/jmxtrans-agent,dd00f/jmxtrans-agent,cyrille-leclerc/jmxtrans-agent,jmxtrans/jmxtrans-agent,dd00f/jmxtrans-agent,cyrille-leclerc/jmxtrans-agent