[SPARK-1520] remove fastutil from dependencies

A quick fix for https://issues.apache.org/jira/browse/SPARK-1520

By excluding fastutil, we bring the number of files in the assembly jar back under 65536, so Java 7 won't create the assembly jar in zip64 format, which cannot be read by Java 6.

With this change, the assembly jar now has about 60000 entries (58000 files), tested with both sbt and maven.

Author: Xiangrui Meng <meng@databricks.com>

Closes #437 from mengxr/remove-fastutil and squashes the following commits:

00f9beb [Xiangrui Meng] remove fastutil from dependencies

pom.xml

@@ -263,6 +263,13 @@
         <groupId>com.clearspring.analytics</groupId>
         <artifactId>stream</artifactId>
         <version>2.5.1</version>
+        <exclusions>
+          <!-- Only HyperLogLog is used, which doesn't depend on fastutil -->
+          <exclusion>
+            <groupId>it.unimi.dsi</groupId>
+            <artifactId>fastutil</artifactId>
+          </exclusion>
+        </exclusions>
       </dependency>
       <!-- In theory we need not directly depend on protobuf since Spark does not directly
            use it. However, when building with Hadoop/YARN 2.2 Maven doesn't correctly bump

project/SparkBuild.scala

@@ -304,7 +304,7 @@ object SparkBuild extends Build {
   val excludeHadoop = ExclusionRule(organization = "org.apache.hadoop")
   val excludeCurator = ExclusionRule(organization = "org.apache.curator")
   val excludePowermock = ExclusionRule(organization = "org.powermock")
-
+  val excludeFastutil = ExclusionRule(organization = "it.unimi.dsi")
 
   def sparkPreviousArtifact(id: String, organization: String = "org.apache.spark",
       version: String = "0.9.0-incubating", crossVersion: String = "2.10"): Option[sbt.ModuleID] = {
@@ -343,7 +343,7 @@ object SparkBuild extends Build {
         "com.twitter"               %% "chill"            % chillVersion excludeAll(excludeAsm),
         "com.twitter"                % "chill-java"       % chillVersion excludeAll(excludeAsm),
         "org.tachyonproject"         % "tachyon"          % "0.4.1-thrift" excludeAll(excludeHadoop, excludeCurator, excludeEclipseJetty, excludePowermock),
-        "com.clearspring.analytics"  % "stream"           % "2.5.1",
+        "com.clearspring.analytics"  % "stream"           % "2.5.1" excludeAll(excludeFastutil),
         "org.spark-project"          % "pyrolite"         % "2.0"
       ),
     libraryDependencies ++= maybeAvro