change implementation of Louvain code to make it consistent with NetworkOperators.buildNetworkClusters, change operator name to NetworkOperators.buildNetworkClustersLouvain
change implementation of Louvain code to make it consistent with NetworkOperators.buildNetworkClusters, change operator name to NetworkOperators.buildNetworkClustersLouvain

micahstubbs/moebio_framework,fmacias64/moebio_framework,shaunstanislaus/moebio_framework,chandantiwari/moebio_framework,hnney/moebio_framework