Update ch 4 source

Author: rahul-raj

04_Building Convolutional Neural Networks/sourceCode/spring-dl4j/src/main/java/com/springdl4j/springdl4j/service/CookBookServiceImpl.java

@@ -18,7 +18,7 @@ public List<String> generateStringOutput(MultipartFile multipartFile) throws IOE
  final List<String> results = new ArrayList<>();
  File convFile = File.createTempFile(multipartFile.getOriginalFilename(),null, new File(System.getProperty("user.dir")+"/"));
  multipartFile.transferTo(convFile);
- INDArray indArray = CustomerRetentionPredictionApi.generateOutput(convFile);
+ INDArray indArray = AnimalClassifierAPI.generateOutput(convFile);
  for(int i=0; i<indArray.rows();i++){
  if(indArray.getDouble(i,0)>indArray.getDouble(i,1)){
  results.add("Customer "+(i+1)+"-> Happy Customer \n");