Add unit test for Reconnection, and socketcluster integration test

[maanavshah]

• Unit Test
  Please add unit test for reconnect
  Also, if possible add test cases in socketclusterclient spec

• Integration test
  It will also be useful if we add integration test for socketclusterclient module
  You can refer the integration spec using em-websocket
  https://github.com/igrigorik/em-websocket/tree/master/spec

[maanavshah]

Closing this issue:
#13
#15