faster leeroy execution

@lonnen r?

With this, if we change the execution option for https://ci.mozilla.org/job/socorro-github/configure to instead say:

```
export MAVEN_HOME=/usr/local/maven
export JAVA_HOME=/usr/lib/jvm/java-1.6.0-sun-1.6.0.22.x86_64
export PATH=$MAVEN_HOME/bin:$JAVA_HOME/bin:$PATH
./scripts/build.sh leeroy
```
Then there's a bunch of things we don't need to do which will save precious time.