update the deprecated CountMinSketchMonoid function to TopPctCMS function

http://twitter.github.io/algebird/index.html#com.twitter.algebird.legacy.CountMinSketchMonoid$
The CountMinSketchMonoid has been deprecated since 0.8.1. Newer code should use TopPctCMS.monoid().

![image](https://cloud.githubusercontent.com/assets/1327396/7269619/d8b48b92-e8d5-11e4-8902-087f630e6308.png)

Author: KeheCAI <caikehe@gmail.com>

Closes #5629 from caikehe/master and squashes the following commits:

e8aa06f [KeheCAI] update algebird-core to version 0.9.0 from 0.8.1
5653351 [KeheCAI] change scala code style
4c0dfd1 [KeheCAI] update the deprecated CountMinSketchMonoid function to TopPctCMS function

examples/pom.xml

@@ -245,7 +245,7 @@
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>algebird-core_${scala.binary.version}</artifactId>
-      <version>0.8.1</version>
+      <version>0.9.0</version>
     </dependency>
     <dependency>
       <groupId>org.scalacheck</groupId>

examples/src/main/scala/org/apache/spark/examples/streaming/TwitterAlgebirdCMS.scala

@@ -18,6 +18,7 @@
 package org.apache.spark.examples.streaming
 
 import com.twitter.algebird._
+import com.twitter.algebird.CMSHasherImplicits._
 
 import org.apache.spark.SparkConf
 import org.apache.spark.SparkContext._
@@ -67,7 +68,8 @@ object TwitterAlgebirdCMS {
 
     val users = stream.map(status => status.getUser.getId)
 
-    val cms = new CountMinSketchMonoid(EPS, DELTA, SEED, PERC)
+    // val cms = new CountMinSketchMonoid(EPS, DELTA, SEED, PERC)
+    val cms = TopPctCMS.monoid[Long](EPS, DELTA, SEED, PERC)
     var globalCMS = cms.zero
     val mm = new MapMonoid[Long, Int]()
     var globalExact = Map[Long, Int]()