SPARK-1316. Remove use of Commons IO

(This follows from a side point on SPARK-1133, in discussion of the PR: https://github.com/apache/spark/pull/164 )

Commons IO is barely used in the project, and can easily be replaced with equivalent calls to Guava or the existing Spark `Utils.scala` class.

Removing a dependency feels good, and this one in particular can get a little problematic since Hadoop uses it too.

Author: Sean Owen <sowen@cloudera.com>

Closes #226 from srowen/SPARK-1316 and squashes the following commits:

21efef3 [Sean Owen] Remove use of Commons IO

1 files changed, 4 insertions, 1 deletions

diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 13d9dbdd9a..ad87fda140 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -529,7 +529,10 @@ private[spark] object Utils extends Logging {
       }
     }
     if (!file.delete()) {
-      throw new IOException("Failed to delete: " + file)
+      // Delete can also fail if the file simply did not exist
+      if (file.exists()) {
+        throw new IOException("Failed to delete: " + file.getAbsolutePath)
+      }
     }
   }