Merge branch 'master' of https://github.com/xuxueli/xxl-job

xxl-job-core/src/main/java/com/xxl/job/core/executor/impl/XxlJobSpringExecutor.java

                     String name = serviceBean.getClass().getAnnotation(JobHandler.class).value();
                     IJobHandler handler = (IJobHandler) serviceBean;
                     if (loadJobHandler(name) != null) {
-                        throw new RuntimeException("xxl-job jobhandler naming conflicts.");
+                        throw new RuntimeException("xxl-job jobhandler naming conflicts.error name:"+name);
                     }
                     registJobHandler(name, handler);
                 }