[VarDumper] fix tests under 5.3
Merge branch '2.6' into 2.7

* 2.6:
  [VarDumper] fix tests under 5.3
  [Console] Move QuestionHelperTest to tty group
  [travis] remove sh wrapper
Merge branch '2.7'

* 2.7:
  [VarDumper] fix tests under 5.3
  [Console] Move QuestionHelperTest to tty group
  [travis] remove sh wrapper