Change default Hadoop version to 2.2.0

This change will make the default Hadoop version used throughought AsterixDB v. 2.2.0. It also introduces
dependencyManagement and parameters in the top-level POM (tlp) for easing the management of this dependency
and other dependencies that are similarly pervasive throughout the code, like commons-io and json.

Change-Id: I51e22edb56717d2100d646d5f41a769881c6c86b
Reviewed-on: http://fulliautomatix.ics.uci.edu:8443/125
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <westmann@gmail.com>
diff --git a/asterix-app/src/test/resources/hadoop/conf/hdfs-site.xml b/asterix-app/src/test/resources/hadoop/conf/hdfs-site.xml
index bff9a3e..4f3f777 100644
--- a/asterix-app/src/test/resources/hadoop/conf/hdfs-site.xml
+++ b/asterix-app/src/test/resources/hadoop/conf/hdfs-site.xml
@@ -26,7 +26,7 @@
 
 <property>
 	<name>dfs.block.size</name>
-	<value>65536</value>
+	<value>1048576</value>
 </property>
 
 </configuration>