* fix deficient code, "/socket.io/" http segment declare

* add agent test and fix expectedData.yaml file

* add listener on tomcat start, work for reduce socket io server start time
change "/socket.io/" operation "http.method", cause get or post will invoke both

* resolve style check error

* change socket io server and client start to health check servlet

* if startClientAndWaitConnect invoke on multi-thread, it will only check client ref, no check connect state, fix it.