Add summary of the Gerrit User Summit at Volvo
Add summary of the Gerrit User Summit at Volvo

Change-Id: Ic2677c93165c6958f608cf7ae38a367563a19dea

GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage