Updated root POM to known stable version of Hadoop
Updated root POM to known stable version of Hadoop

tudelft-atlarge/graphalytics,ldbc/ldbc_graphalytics,tudelft-atlarge/graphalytics,tudelft-atlarge/graphalytics,ldbc/ldbc_graphalytics,ldbc/ldbc_graphalytics,tudelft-atlarge/graphalytics,ldbc/ldbc_graphalytics,ldbc/ldbc_graphalytics,tudelft-atlarge/graphalytics