[DISCUSS] Enable PreCommit build

[Josh Elser]

Hi,

Per the other thread "Yetus Accumulo 'Personality'" [1], I'd like to see 
what people think about turning this on by default.

I've been talking to Sean in chat today who had made a suggestion that 
we get our own JIRA acct instead of the "Hadoop QA" user. Aside from 
that, I'm pretty happy with this.

There is likely further tweaking we can do (e.g. multijdk builds, try 
the sunny-day ITs). One big concern is the presence of a -1/+1 in an CTR 
community. We would need some docs to be clear that the PreCommit 
comment is a tool for vetting contributions, not a bar that must be 
satisfied prior to commit (this is a simple website update).

Anywho -- if you have opinions, please let them be heard now. If there 
isn't any argument against, I'll move ahead with this in time.


[1] 
http://mail-archives.apache.org/mod_mbox/accumulo-dev/201601.mbox/%3c568b5bfc.2080...@gmail.com%3E