[Spark][Java][Info] Add property-group-related methods for edge info and vertex info

[Thespica]

Proposed changes

Here I created a class called PropertyGroups for conveiently used by vertex info and edge info, it shouldn't be exposed to out side.

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• [x] I have read the CONTRIBUTING doc
• [x] I have signed the CLA
• [x] Lint and unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

Further comments

related issue #406

[acezen]

Hi, @Thespica, you can merged to the spark-java-refactoring directly if you think it can be merged.