FIX::fixed package names and imports

changed gogreen to greenify

FIX::made user tostring test succeed

added toString method to user

src/Common/src/main/java/greenify/common/ApplicationException.java

@@ -1,4 +1,4 @@
-package gogreen.common;
+package greenify.common;
 
 public class ApplicationException extends RuntimeException {
     public ApplicationException(String message) {

src/Common/src/main/java/greenify/common/ErrorResponse.java

@@ -1,4 +1,4 @@
-package gogreen.common;
+package greenify.common;
 
 public class ErrorResponse {
     String message;

src/Common/src/main/java/greenify/common/UserDTO.java

@@ -1,4 +1,4 @@
-package gogreen.common;
+package greenify.common;
 
 public class UserDTO {
     private Long id;