[java-info] Merge java-info code into main by components step by step

[Thespica]

Describe the enhancement requested

Now, the java-info code basically has been completed in this branch. I am going to merge these code into main branch by components step by step:

• basic architecture(including pom.xml and directory), yaml, type and util
• small class like Property and AdjacentList
• graph, vertex and edge info

Component(s)

Format, Java, Spark

[SemyonSinchenko]

May we postpone that until we decide with proto?
(see #475 and discussion in mailing list)

[Thespica]

Hi @SemyonSinchenko , I think this two missions are relatively independent, the merge won't effect the decision about proto.

[acezen]

May we postpone that until we decide with proto? (see #475 and discussion in mailing list)

I think is ok to migrate the current implementation from branch-feat-spark-java-info-refactoring to main. when the discussion about protobuf is done, we can refactoring the module on the main branch.