Reduce number of test shards from 8 to 6 on Travis-ci

Review Request #1804 - Created Feb. 20, 2015 and submitted

Information
Eric Ayers
pants
zundel/reduce-travis-shards
1141
a312b30...
Reviewers
pants-reviews
jsirois

Watching the builds late at night, our project never gets more than 5 shards. This means that there is some
tradeoff where fewer longer running shards will actually outperform more shorter ones.

We were up to 12 total shards and the timeline went like this:

*--------->
  ... first 5 shards ...
  *---------->
           *-------->
              ... next 5 shards ...
              *-------->
                     *------->
                       ... last 2 shards ...
                       *------->

I deduced this from watching: https://travis-ci.org/pantsbuild/pants/builds/51516004 and others late at night or early in the morning. In one example

CI is running at: https://travis-ci.org/pantsbuild/pants/builds/51517276

Eric Ayers
John Sirois
Eric Ayers
Review request changed

Status: Closed (submitted)

Change Summary:

Thanks John, Let's just try this and see. If you want to change it back I'll rubber stamp the change. Commit 51be4e8

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