Modulate the timebomb

Using an assumption on the methods that we're ignoring rather than the
timebomb method itself.

This feels a bit cleaner to me, and ignores the tests properly, rather
than using @Ignore.

Conflicts:
	repose-aggregator/commons/utilities/src/test/java/com/rackspace/papi/commons/util/logging/apache/format/converters/DateTimeFormatConverterTest.groovy