[C++] fix comment of PublicationManager::getTimeUntilNextPublication
[C++] fix comment of PublicationManager::getTimeUntilNextPublication

Change-Id: I15f5b82dc3f5de47ba3a81c6bd50ebb7bbe41682

bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr