remove cobertura logback dependency
remove cobertura logback dependency

Yiiinsh/x-pipe,Yiiinsh/x-pipe,ctripcorp/x-pipe,ctripcorp/x-pipe,ctripcorp/x-pipe,ctripcorp/x-pipe,Yiiinsh/x-pipe,ctripcorp/x-pipe,Yiiinsh/x-pipe,ctripcorp/x-pipe