Minor Description
According to http://cwiki.apache.org/DIRxSRVx11/42-using-apacheds-for-unit-tests.html and http://vm094.oxylos.org/projects/apacheds/apidocs/org/apache/directory/server/core/integ/annotations/ApplyLdifFiles.html the @ApplyLdifFiles is used by the integration test runner to apply custom changes to the temporary directory server instance.
However, unlike @ApplyLdifs annotation (which works fine), the information from @ApplyLdifFiles seems to be unused - it ends up in the org.apache.directory.server.core.integ.InheritableSettings class, and getLdifFiles() method seems to not be called from anywhere except the method itself (I've grepped the whole trunk sources of Apache DS).
The documentation should mention that this functionality isn't implemented yet.