made test logging configurable

Made the tests output to std if you append the following to maven

```bash
-Dtest.output.redirect=false -Dtachyon.root.logger=DEBUG,CONSOLE
```

Just typing `mvn test` will log to file.

Want to have our jenkins log to stdout so the history is saved in jenkins.
Copy/paste fail. I'll fix in 2 hours or so
On Jul 26, 2014 10:59 AM, "Haoyuan Li" <notifications@github.com> wrote:

> In core/src/test/resources/log4j.properties:
>
> > @@ -1,8 +1,16 @@
> > -log4j.rootLogger=INFO, TEST_LOGGER
> > +tachyon.root.logger=INFO, TEST_LOGGER
> > +tachyon.log.dir=.
> > +tachyon.log.file=hbase.log
>
> hbase.log?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/amplab/tachyon/pull/306/files#r15434996>.
>