Some commands can be configured by defining properties. These properties are
stored in the karma.properties in the project base dir of a
working context.
An example of such a properties file (in this case with properties for
the build-module command) is:
java.compiler=modern
java.source=1.4
java.target=1.4
java.debug=true
java.debuglevel=none
javac.nowarn=true
javac.optimize=off
javac.deprecation=off
javac.verbose=yes
javac.depend=off