1.x: Publish code coverage results to codecov.io

[zsxwing]

This is an example built in my repo: https://codecov.io/gh/zsxwing/RxJava/

[artem-zinnatullin]

Yes! I actually started the same in my fork previous week 😸.

@akarnokd: 2 most important things that codecov gives:

1. Code coverage for each PR and configurable commit status check, it'll report that some changes in files from PR are not covered and how overall coverage of the project was affected by PR.
2. At any time you can check coverage of particular file, take a look https://codecov.io/gh/zsxwing/RxJava/tree/1.x/src/main/java/rx .

We use it in several projects: StorIO, qualitymatters and others, it makes testing more fun and improves quality of the project.

[artem-zinnatullin]

Please specify version of jacoco, like this:

jacoco {
  toolVersion = '0.7.7.201606060606' // See http://www.eclemma.org/jacoco/.
}

[zsxwing]

Added.

[codecov-io]

Current coverage is 80.32%

No coverage report found for 1.x at b8bccd9.

Powered by Codecov. Last updated by b8bccd9...af876b9

[akarnokd]

👍

[artem-zinnatullin]

👍 yay, so happy about it, thx @zsxwing!

[zsxwing]

PR for 2.x is on the way :)