1. Change word of palo to doris in conf file.
2. Set default meta_dir to ${DORIS_HOME}/doris-meta
3. Comment out FE meta_dir, leave it to ${DORIS_HOME}/doris-meta, as exsting in FE Config.java.
4. Comment out BE storage_root_path, leave it to ${DORIS_HOME}/storage, as exsting in BE config.h.
NOTICE: default config is changed.