Provide a way for multiple executions of failsafe:integration-test to communicate with failsafe:verify (and the maven-surefire-report-plugin)

Providing such a means to communicate would be useful to support use cases like the following, reported on the Maven users lists (http://www.mail-archive.com/users@maven.apache.org/msg104821.html):

Our project has a set of integration tests that have to be passed using
several combinations of systemProperties/argLine. (Note that the test
classes are identical; only the configuration changes.)

Getting the tests to execute is easy; I just bind multiple executions of
failsafe:integration-test to the integration-test phase. Getting
failsafe:verify to pick up all tests results, however, is not, as I
wasn't able to figure out which parameters to tweak: summaryFile?
reportsDirectory?