[java-info] Add vertex, edge, graph info

[Thespica]

Reason for this PR

The third step in issue #478 .

What changes are included in this PR?

• Add vertex, edge, graph info;
• Move AdjList, Property, PropertyGroup into info package.

Are these changes tested?

no

Are there any user-facing changes?

no

[acezen]

Hi, John, you may need to add some API document in the code , that would help user/developer to know what the method use for

[SemyonSinchenko]

Hi, John, you may need to add some API document in the code , that would help user/developer to know what the method use for

Is it the right time for that? Because we are in the middle of a decision about using proto: with proto info, classes should be refactored again. I would like to recommend postponing writing docs.

[acezen]

Hi, John, you may need to add some API document in the code , that would help user/developer to know what the method use for

Is it the right time for that? Because we are in the middle of a decision about using proto: with proto info, classes should be refactored again. I would like to recommend postponing writing docs.

Yes, you are right, considering the proto decision, postponing the docs avoids refactor again, thanks Sem