There was an air of "The Last Hurrah" as Bob Crane, then 85, stepped to the microphone at St. Cecilia Church in the Back Bay to eulogize his pal Kevin White, the legendary four-term mayor of this city who was 82 when he succumbed to Alzheimer's disease five years ago. Everyone expected Crane, who was Massachusetts' state treasurer for a record 27 years, to regale the massive congregation with raucous recollections of the salad days they shared, and he did not disappoint.