JAV-149 New multiple microservice

[wujimin]

most modify is "revert old multiple microservice logic.", this is not important, just delete old logic
other commit is important.

[coveralls]

Coverage decreased (-0.09%) to 84.766% when pulling 71eebc5 on wujimin:new-multiple-microservice into a160d43 on ServiceComb:master.

[WillemJiang]

Just reviewed the code with wujimin face to face.