activiti-explore示例改变默认数据库、禁用默认用户和群组，流程定义，数据模型设置(导致explore无法访问)

<bean id="demoDataGenerator" class="org.activiti.explorer.demo.DemoDataGenerator">
        <property name="processEngine" ref="processEngine" />
        <property name="createDemoUsersAndGroups" value="false" />
        <property name="createDemoProcessDefinitions" value="false" />
        <property name="createDemoModels" value="false" />
      </bean>