private int getIntProperty(final String propertyName, final int defaultValue) {
        final String propertyValue = System.getProperty(propertyName);
        if(propertyValue == null) {
            return defaultValue;
        }
        return Integer.valueOf(propertyValue);
    }
Base class for all TinkerPop OpenJDK JMH benchmarks.  Based upon Netty's approach to running JMH benchmarks
from JUnit.

@see <a href="http://netty.io/wiki/microbenchmarks.html"</a>

@author Ted Wilmes (http://twilmes.org)
gremlin-tools/gremlin-benchmark/src/main/java/org/apache/tinkerpop/benchmark/util/AbstractBenchmarkBase.java