Fixes NoSuchMethodException



```
java.lang.NoSuchMethodException: java.net.HttpURLConnection.setFixedLengthStreamingMode(scala.Long)
	at java.lang.Class.getDeclaredMethod(Class.java:2004)
	at scalaj.http.Http$.<init>(Http.scala:294)
	at scalaj.http.Http$.<clinit>(Http.scala)
	at com.zaneli.escalade.hipchat.HttpExecutor$class.httpExecute(ClientBase.scala:65)
	at com.zaneli.escalade.hipchat.Rooms.httpExecute(Rooms.scala:11)
	at com.zaneli.escalade.hipchat.Rooms$list$$anonfun$$lessinit$greater$4.apply(Rooms.scala:75)
	at com.zaneli.escalade.hipchat.Rooms$list$$anonfun$$lessinit$greater$4.apply(Rooms.scala:75)
	at com.zaneli.escalade.hipchat.ClientBase.execute(ClientBase.scala:22)
	at com.zaneli.escalade.hipchat.AuthClientBase.execute(ClientBase.scala:44)
	at com.zaneli.escalade.hipchat.Rooms$list$.call(Rooms.scala:82)
	at dataxu.rt.metrics.routermonitor.testing$delayedInit$body.apply(testing.scala:6)
	at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
	at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
	at scala.App$$anonfun$main$1.apply(App.scala:71)
	at scala.App$$anonfun$main$1.apply(App.scala:71)
	at scala.collection.immutable.List.foreach(List.scala:318)
	at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:32)
	at scala.App$class.main(App.scala:71)
	at dataxu.rt.metrics.routermonitor.testing$.main(testing.scala:3)
	at dataxu.rt.metrics.routermonitor.testing.main(testing.scala)
```

Env:
```
$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

$ scala -version
Scala code runner version 2.11.1 -- Copyright 2002-2013, LAMP/EPFL
```