The Bruins front office went through some turnover with assistant general manager Jim Benning leaving to manage hockey operations in Vancouver, but the good news is that Benning wasn’t one of the principal negotiators in contract talks. That role normally comes down B’s general manager Peter Chiarelli and assistant general manager Don Sweeney, and they’ll be busy with a number of free agents, both restricted and unrestricted, looking for new contracts this summer. A source with knowledge of negotiations told that the other prospective B’s free agents are essentially on hold while the B’s front office focuses on getting something done with unrestricted free agent Jarome Iginla prior to July 1. While the 37-year-old didn’t have a stellar postseason, it appears the Bruins are putting in the effort to close the deal on an extension with Iginla after he posted a 30-goal season in his first year with the Black and Gold. Iginla also led the Bruins with five postseason goals while also missing on at least a half dozen other scoring chances for a Boston team that had trouble hitting pay dirt against the Canadiens in the second round. That would mean at least one more season of David Krejci, Milan Lucic and Iginla with a chance to prove that this spring’s playoff blackout was an aberration, and that the 13 posts and crossbars easily could have been goals. In an ideal world the Bruins might have chased after a faster, game-breaking force to pair with Krejci and Lucic, but it doesn’t appear the cap space will allow for it.