Five seats on the Boulder City Council, including the mayor’s seat, are on the ballot this November, and candidates are already staking out positions on some of the city’s most contentious issues. At Boulder Progressives’ Raucous Caucus on June 6, candidates outlined their views on housing growth, homelessness, tipped wages, the future of the municipal airport and how to address a multimillion-dollar budget shortfall. Mayor Aaron Brockett and Co…