NOJIRA Upgrade to Spark 1.1.0

If you need to build Spark follow these instructions, not the ones on the Spark site:

1. Build Spark for your version of Hadoop **but do not use "mvn package ...”** use “mvn install …” This will put a copy of the exact bits you need into the maven cache for building mahout against. In my case using hadoop 1.2.1 it was "mvn -Dhadoop.version=1.2.1 -DskipTests clean install” If you run tests on Spark some failures can safely be ignored according to the Spark guys so check before giving up. 
2. build mahout with “mvn clean install"