- Erased unnecessary CDH5-specific note in docs/building-spark.md

- Remove example of instance -Phadoop-2.2 -Dhadoop.version=2.2.0 in docs/building-spark.md
- Enabled hadoop-2.2 profile when the Hadoop version is 2.2.0, which is now the default .Added comment in the yarn/pom.xml to specify that.

Author: FavioVazquez

docs/building-spark.md

@@ -83,10 +83,6 @@ mvn -Dhadoop.version=1.2.1 -DskipTests clean package
 # Cloudera CDH 4.2.0 with MapReduce v1
 mvn -Dhadoop.version=2.0.0-mr1-cdh4.2.0 -DskipTests clean package
 
-#Cloudera CDH 5.3.3 without MapReduce
-
-mvn -Dhadoop.version=2.5.0-cdh5.3.3 -DskipTests clean package
-
 # Apache Hadoop 0.23.x
 mvn -Phadoop-0.23 -Dhadoop.version=0.23.7 -DskipTests clean package
 {% endhighlight %}
@@ -96,8 +92,6 @@ You can enable the "yarn" profile and optionally set the "yarn.version" property
 Examples:
 
 {% highlight bash %}
-# Apache Hadoop 2.2.X
-mvn -Pyarn -Phadoop-2.2 -Dhadoop.version=2.2.0 -DskipTests clean package
 
 # Apache Hadoop 2.3.X
 mvn -Pyarn -Phadoop-2.3 -Dhadoop.version=2.3.0 -DskipTests clean package

yarn/pom.xml

@@ -109,6 +109,16 @@
       <properties>
         <jersey.version>1.9</jersey.version>
       </properties>
+      <!-- Enable hadoop-2.2 profile when the Hadoop version is 2.2.0, which is now 
+      the default. Those building against 2.2.x or some distro-specific variation of 
+      that string would still have to manually enable -Phadoop-2.2.
+      -->
+      <activation>
+       <property>
+        <name>hadoop.version</name>
+         <value>2.2.0<value>
+       </property>
+      </activation>
       <dependencies>
         <dependency>
           <groupId>org.mortbay.jetty</groupId>