Removed returning hashed password and salt when looking up jami users

Change-Id: Ic23bc25b1266d2866d492333ff3d268491c6982a

jams-server/src/main/java/net/jami/jams/server/servlets/api/admin/users/UserServlet.java

@@ -77,6 +77,8 @@ public class UserServlet extends HttpServlet {
                 dataStore.getUserDao().updateObject(update, constraint);
                 user = dataStore.getUserDao().getObjects(statementList).get(0);
             }
+            user.setPassword("");
+            user.setSalt("");
             resp.getOutputStream().write(JsonStream.serialize(user).getBytes());
             resp.setStatus(200);
         } else {