Running functional/integration tests

[Josh Elser]

In an effort to make debugging the functional tests a bit easier, I 
wrote a small script to hide the awkwardness in Maven that's required to 
accomplish it.

Look for it in master under test/bin/run-test.sh. You must provide it a 
string of test(s) to run, with the same supported syntax that the 
surefire-plugin supports [1]. You can also provide additional options 
such as the forkcount for concurrent tests, e.g. -Daccumulo.it.forkCount=2.

And, as always, make sure you install snapshot artifacts if you've made 
changes in another module before running the functional tests to ensure 
that your changes are actually picked up.

- Josh

[1] 
http://maven.apache.org/surefire/maven-surefire-plugin/examples/single-test.html