Added haveged to travis build for faster random number generation
Added haveged to travis build for faster random number generation

marevol/incubator-predictionio,PredictionIO/PredictionIO,dszeto/incubator-predictionio,mars/incubator-predictionio,dszeto/incubator-predictionio,himanshudhami/PredictionIO,PredictionIO/PredictionIO,marevol/incubator-predictionio,dszeto/incubator-predictionio,himanshudhami/PredictionIO,shimamoto/incubator-predictionio,himanshudhami/PredictionIO,takezoe/incubator-predictionio,takezoe/incubator-predictionio,mars/incubator-predictionio,shimamoto/incubator-predictionio,marevol/incubator-predictionio,PredictionIO/PredictionIO,mars/incubator-predictionio,shimamoto/incubator-predictionio,takezoe/incubator-predictionio,shimamoto/incubator-predictionio,dszeto/incubator-predictionio,marevol/incubator-predictionio,himanshudhami/PredictionIO,mars/incubator-predictionio,takezoe/incubator-predictionio