adjust license&notice

[wangkirin]

No description provided.

[coveralls]

Coverage increased (+0.3%) to 62.838% when pulling 8379862 on wangkirin:notice_license into 1e3a4af on ServiceComb:master.

[yangbor]

1. Third party NOTICE files should be included(prometheus)
2. There's no need to keep a separate copy of apache 2.0 license for third party libraries

[asim]

Can you actually remove licenses when your original works were based on them? What you are left with is modified code. You cannot strip references just because you now no longer fork the code.

[zhanbei]

According to https://blog.github.com/2015-01-21-how-to-write-the-perfect-pull-request/ , I suppose by "adjust license&notice" you mean what this Pull Request does but not the purpose of this PR which is expected.

Include the purpose of this Pull Request. For example:

This is a spike to explore…
This simplifies the display of…
This fixes handling of…

This comment is just a suggestion that I would like to point out and I hope it didn't bother you. Thanks.

[wangkirin]

Thanks for all the reviews and suggestions, I will reconsider this PR