add e2e test

[JaneLiuL]

as we know that e2e testing has been more reliable and widely adopted because of the following benefits:

• Expand test coverage
• Ensure the correctness of the application
• Reduce time to market
• Reduce cost
• Detect bugs so this issues is for provide a proposal for add e2e test on superedge.

What would you like to be added/modified: add e2e package under /test/e2e/. the first commit will cover one or more module.

Why is this needed:

[JaneLiuL]

/assign i have a draft commit, will raise as soon as i can. very welcome for discussion and comments :)