ninja: move nosetests.xml back to .jenkins/Jenkinsfile
ninja: move nosetests.xml back to .jenkins/Jenkinsfile

nosetests.xml were removed accidentally under CASSANDRA-17397

instaclustr/cassandra,thelastpickle/cassandra,blambov/cassandra,mshuler/cassandra,apache/cassandra,apache/cassandra,jrwest/cassandra,mike-tr-adamson/cassandra,pauloricardomg/cassandra,thelastpickle/cassandra,pauloricardomg/cassandra,adelapena/cassandra,adelapena/cassandra,mike-tr-adamson/cassandra,mike-tr-adamson/cassandra,mshuler/cassandra,pauloricardomg/cassandra,tjake/cassandra,thelastpickle/cassandra,adelapena/cassandra,instaclustr/cassandra,adelapena/cassandra,jrwest/cassandra,blambov/cassandra,blambov/cassandra,instaclustr/cassandra,tjake/cassandra,jrwest/cassandra,mike-tr-adamson/cassandra,jrwest/cassandra,apache/cassandra,mshuler/cassandra,instaclustr/cassandra,blambov/cassandra,pauloricardomg/cassandra,mshuler/cassandra,thelastpickle/cassandra,tjake/cassandra,apache/cassandra,tjake/cassandra