Try to fix JDK 1.6 gump instance failure by increasing the delay - testBlockedRemoveWithAddAll2 failed with the message "Both objects were removed expected:<0> but was:<1>" see http://gump.zones.apache.org/gump/test/apache-commons/commons-collections/gump_work/build_apache-commons_commons-collections.html
commons/proper/collections/trunk/src/test/org/apache/commons/collections/buffer/TestBlockingBuffer.java