[SPARK-1459] Use local path (and not complete URL) when opening local lo...

...g file.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #375 from vanzin/event-file and squashes the following commits:

f673029 [Marcelo Vanzin] [SPARK-1459] Use local path (and not complete URL) when opening local log file.

core/src/main/scala/org/apache/spark/util/FileLogger.scala

@@ -91,7 +91,7 @@ private[spark] class FileLogger(
     val dstream = uri.getScheme match {
       case "file" | null =>
         // Second parameter is whether to append
-        new FileOutputStream(logPath, !overwrite)
+        new FileOutputStream(uri.getPath, !overwrite)
 
       case _ =>
         val path = new Path(logPath)