feat(java,info): add prefix for adj/pg and add datatype parser test#820

yangxk1 merged 2 commits intoapache:mainapache/incubator-graphar:mainfrom

yangxk1:814-default-prefix-for-adj-and-pgyangxk1/incubator-graphar:814-default-prefix-for-adj-and-pgCopy head branch name to clipboard