Builds on Jenkins

[Josh Elser <jo...@gmail.com>]

Hi,

I've creating a View on the ASF Jenkins and populated it with a Matrix 
job for Ratis to try out (based on a job I created for Calcite's Avatica 
project).

https://builds.apache.org/view/M-R/view/Ratis/

The general workflow is this: we define some axes for which we want to 
test/validate a given commit of Ratis, we test each of those axes. If 
all axes pass, we publish a SNAPSHOT build of Ratis using those results.

For example, one obvious axis we can use is JDK version. We might want 
to ensure that Ratis compiles and runs tests against JDK8 and JDK9 
before publishing a SNAPSHOT.

It seems like we have some test failures on the first run I kicked off 
-- I've avoided sending emails to the list to spare you all the spam. 
Please reach out if you are interested in following along/helping out. I 
expect I'll have to ask some questions to try to get these tests all 
passing :)

- Josh