If you want to null out a small rate like that, you can use the setDeadband method in the Gyro class. we were a little confused since it shows up in the c++ version of the code, but not the java version. Look at the gyro.java code posted here:
https://usfirst.collab.net/gerrit/gitweb?p=allwpilib.git;a=blob;f=wpilibj/wpilibJavaDevices/src/main/java/edu/wpi/first/wpilibj/Gyro.java;h=ea1e1cc301c71243e091206312fa281fb2f5e5 87;hb=HEAD
The setDeadband is not made public, I don't know why. we just copied the code as a newGyro.java class in our project and made it public. It seems to work fine so far. You will lose a little accuracy with a larger deadband, but if it is small, it most likely won't be a problem.
Hope this helps,
Lennie