functionLoadData: function(component, event, helper){
   var data = component.get('v.data');
   var param = {'test' : data, 'test1' : data}
   data.setParams(param);
   $A.enqueueAction(component.get('c.showData));
}

showData: function(test, test1) {
 console.log(test,test1); //shows undefined
}