message: resolve package confliction with tomcat jars
diff: <groupId>com.webank.wedatasphere.dss</groupId>
  <artifactId>visualis-server</artifactId>
  <version>${project.version}</version>
  + <exclusions>
  + <exclusion>
  + <groupId>org.apache.tomcat</groupId>
  + <artifactId>tomcat-annotations-api</artifactId>
  + </exclusion>
  +
  + <exclusion>
  + <groupId>org.apache.tomcat.embed</groupId>
  + <artifactId>tomcat-embed-core</artifactId>
  + </exclusion>
  +
  + <exclusion>
  + <groupId>org.apache.tomcat.embed</groupId>
  + <artifactId>tomcat-embed-el</artifactId>
  + </exclusion>
  +
  + <exclusion>
  + <groupId>org.apache.tomcat.embed</groupId>
  + <artifactId>tomcat-embed-websocket</artifactId>
  + </exclusion>
  +
  + <exclusion>
  + <groupId>org.apache.tomcat</groupId>
  + <artifactId>tomcat-jdbc</artifactId>
  + </exclusion>
  +
  + <exclusion>
  + <groupId>org.apache.tomcat</groupId>
  + <artifactId>tomcat-juli</artifactId>
  + </exclusion>
  + </exclusions>
  </dependency>
  </dependencies>
  